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Obligations · Annex Vd

Part-CAO obligations

Approval of organisations that maintain and manage aircraft that are not complex motor-powered and not in an air carrier's operating certificate.

156 obligations from 23 rules124 must · 28 may · 4 must notChecked against the text in force on 2 Nov 2026

156 obligations

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CAO.A.015Application

1 obligation · Rule text

  • Must

    Apply to the competent authority in the form and manner established by that authority.

    When seeking issuance of, or change to, a CAO approval.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.015

    CAOs shall apply for the issuance of, or change to, a CAO approval to the competent authority in a form and manner established by that authority.

    CAO.A.015 · Regulation (EU) No 1321/2014 · verbatim

CAO.A.017Means of compliance

2 obligations · Rule text

  • May

    Use alternative means of compliance to the adopted acceptable means to demonstrate compliance with Regulation (EU) 2018/1139 and its delegated and implementing acts.

    After prior approval by the competent authority and receipt of the notification provided for in CAO.B.017.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.017(a)

    (a)Alternative means of compliance to the acceptable means of compliance adopted by the Agency may be used by an organisation to demonstrate compliance with Regulation (EU) 2018/1139 and its delegated and implementing acts. (b) When an organisation wishes to use alternative means of compliance, it shall, prior to using it, provide the competent authority with a full description of those alternative means of compliance. That description shall include an assessment demonstrating compliance of alternative means of compliance with Regulation (EU) 2018/1139 and its delegated and implementing acts. The organisation may use those alternative means of compliance subject to prior approval by the competent authority, and upon receipt of the notification as provided for in point CAO.B.017.

    CAO.A.017(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Provide the competent authority with a full description of the alternative means of compliance, including an assessment demonstrating compliance with Regulation (EU) 2018/1139 and its delegated and implementing acts.

    Before using alternative means of compliance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.017(b)

    (b)When an organisation wishes to use alternative means of compliance, it shall, prior to using it, provide the competent authority with a full description of those alternative means of compliance. That description shall include an assessment demonstrating compliance of alternative means of compliance with Regulation (EU) 2018/1139 and its delegated and implementing acts.

    CAO.A.017(b) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.020Terms of approval

12 obligations · Rule text

  • Must

    Specify the approved scope of work in the CAE, as provided for in CAO.A.025.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)

    (a)The CAO shall specify the approved scope of work in its combined airworthiness exposition (CAE), as provided for in point CAO.A.025.

    CAO.A.020(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Indicate the particular aircraft types in the scope of work.

    For aeroplanes above 2 730 kg MTOM, helicopters above 1 200 kg MTOM or certified for more than four occupants, and other aircraft that are not ELA2.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(1)

    (1)For aeroplanes of more than 2 730 kg maximum take-off mass (MTOM) and for helicopters of more than 1 200 kg MTOM or certified for more than four occupants and for other aircraft which are not ELA2, the scope of work shall indicate the particular aircraft types. Changes to this scope of work shall be approved by the competent authority in accordance with point (a) of point CAO.A.105 and point (a) of point CAO.B.065.

    CAO.A.020(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Obtain competent-authority approval of scope-of-work changes in accordance with CAO.A.105(a) and CAO.B.065(a).

    Before changing the scope of work for aircraft covered by CAO.A.020(a)(1).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.020(a)(1)

    (1)For aeroplanes of more than 2 730 kg maximum take-off mass (MTOM) and for helicopters of more than 1 200 kg MTOM or certified for more than four occupants and for other aircraft which are not ELA2, the scope of work shall indicate the particular aircraft types. Changes to this scope of work shall be approved by the competent authority in accordance with point (a) of point CAO.A.105 and point (a) of point CAO.B.065.

    CAO.A.020(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Indicate the engine manufacturer, group, series, type or maintenance tasks in the scope of work.

    For engines other than piston or electric.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(2)

    (2)For engines other than piston or electric, the scope of work shall indicate the engine manufacturer or group or series or type or the maintenance task(s). Changes to this scope of work shall be approved by the competent authority in accordance with point (a) of point CAO.A.105 and point (a) of point CAO.B.065.

    CAO.A.020(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Obtain competent-authority approval of scope-of-work changes in accordance with CAO.A.105(a) and CAO.B.065(a).

    Before changing the scope of work for engines other than piston or electric.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.020(a)(2)

    (2)For engines other than piston or electric, the scope of work shall indicate the engine manufacturer or group or series or type or the maintenance task(s). Changes to this scope of work shall be approved by the competent authority in accordance with point (a) of point CAO.A.105 and point (a) of point CAO.B.065.

    CAO.A.020(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must not

    Hold maintenance privileges for aeroplanes, helicopters or other aircraft that are not ELA2 and have power plants other than electric or piston engines.

    If only one person plans and carries out all maintenance tasks, in an aircraft-rated CAO.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(3)(a)

    (3)A CAO which employs only one person for both planning and carrying out of all maintenance tasks cannot hold privileges for the maintenance of: (a) aeroplanes, helicopters and other aircraft which are not ELA2, if their power plant is other than electric or piston engine(s) (in the case of aircraft-rated organisations); (b) helicopters equipped with more than one piston engine (in the case of aircraft-rated organisations); (c) complete engines other than piston engines with output power below 450 HP or electric engines (in the case of engine-rated organisations).

    CAO.A.020(a)(3)(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must not

    Hold maintenance privileges for helicopters equipped with more than one piston engine.

    If only one person plans and carries out all maintenance tasks, in an aircraft-rated CAO.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(3)(b)

    (3)A CAO which employs only one person for both planning and carrying out of all maintenance tasks cannot hold privileges for the maintenance of: (a) aeroplanes, helicopters and other aircraft which are not ELA2, if their power plant is other than electric or piston engine(s) (in the case of aircraft-rated organisations); (b) helicopters equipped with more than one piston engine (in the case of aircraft-rated organisations); (c) complete engines other than piston engines with output power below 450 HP or electric engines (in the case of engine-rated organisations).

    CAO.A.020(a)(3)(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must not

    Hold maintenance privileges for complete engines other than piston engines with output power below 450 HP or electric engines.

    If only one person plans and carries out all maintenance tasks, in an engine-rated CAO.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(3)(c)

    (3)A CAO which employs only one person for both planning and carrying out of all maintenance tasks cannot hold privileges for the maintenance of: (a) aeroplanes, helicopters and other aircraft which are not ELA2, if their power plant is other than electric or piston engine(s) (in the case of aircraft-rated organisations); (b) helicopters equipped with more than one piston engine (in the case of aircraft-rated organisations); (c) complete engines other than piston engines with output power below 450 HP or electric engines (in the case of engine-rated organisations).

    CAO.A.020(a)(3)(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Control the scope of work in accordance with the procedure in CAO.A.025(a)(11).

    For aircraft outside CAO.A.020(a)(1), components other than complete turbine engines, and NDT-specialised services.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(4)

    (4)For aircraft other than those mentioned in point (1), for components different from complete turbine engines and for non-destructive testing (NDT)-specialised services, the scope of work shall be controlled by the CAO in accordance with the procedure set out in point (a)(11) of point CAO.A.025.

    CAO.A.020(a)(4) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Classify the scope of work using the system ratings listed in CAO.A.020(a)(4)(i) to (xxiii).

    For maintenance of components other than complete engines.

    Who
    CAO
    When
    Always
    Rule text CAO.A.020(a)(4)

    For maintenance of components different from complete engines, the scope of work shall be classified in accordance with the following system ratings:

    CAO.A.020(a)(4) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Include all details necessary in the scope of work to ensure privileges are identical to those in the existing approval.

    When obtaining approval under Article 4(4) on the basis of an existing Part-M Subpart G or F, or Part-145, approval.

    Who
    CAO
    When
    Once
    Rule text CAO.A.020(a)(4)

    Organisations obtaining an approval in accordance with this Annex on the basis of an existing organisation approval issued in accordance with Subpart G or Subpart F of Annex I (Part-M) or Annex II (Part-145) in accordance with paragraph 4 of Article 4, shall include in the scope of work all the necessary details to ensure that the privileges are identical to the ones included in the existing approval.

    CAO.A.020(a)(4) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Fabricate a restricted range of parts in conformity with maintenance data for use during work within the CAO’s own facilities, as indicated in the CAE.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.020(c)

    (c)complete engines other than piston engines with output power below 450 HP or electric engines (in the case of engine-rated organisations).

    CAO.A.020(c) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.025Combined airworthiness exposition

3 obligations · Rule text

  • Must

    Provide a CAE containing at least all information listed in CAO.A.025(a)(1) to (11).

    Who
    CAO
    When
    Always
    Rule text CAO.A.025(a)

    (a)The CAO shall provide a manual containing at least the following information:

    CAO.A.025(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Obtain competent-authority approval of the initial CAE.

    Who
    CAO
    When
    Once
    Rule text CAO.A.025(b)

    (b)The initial CAE shall be approved by the competent authority.

    CAO.A.025(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Handle amendments to the CAE in accordance with CAO.A.105.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.025(c)

    (c)Amendments to the CAE shall be handled in accordance with point CAO.A.105.

    CAO.A.025(c) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.030Facilities

6 obligations · Rule text

  • Must

    Ensure all facilities necessary for the planned work, including adequate office accommodation, are provided.

    Who
    CAO
    When
    Always
    Rule text CAO.A.030

    The CAO shall ensure that all necessary facilities, including adequate office accommodation are provided for it to be able to carry out all the planned work.

    CAO.A.030 · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure specialised workshops, hangars and bays provide adequate protection from contamination and the environment.

    When the scope of approval includes maintenance activities.

    Who
    CAO
    When
    Always
    Rule text CAO.A.030(a)

    In addition, where the scope of approval of the organisation includes maintenance activities, the CAO shall ensure that: (a) specialised workshops, hangars and bays provide adequate protection from contamination and the environment;

    CAO.A.030(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Provide secure storage facilities for components, equipment, tools and material.

    When the scope of approval includes maintenance activities.

    Who
    CAO
    When
    Always
    Rule text CAO.A.030(b)

    (b)secure storage facilities are provided for components, equipment, tools and material, under conditions ensuring that unserviceable components and materials are segregated from all other components, material, equipment and tools, that the manufacturer’s instructions for storage are complied with and that access to the storage facilities is restricted to authorised personnel.

    CAO.A.030(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure unserviceable components and materials are segregated from all other components, material, equipment and tools in storage.

    When the scope of approval includes maintenance activities.

    Who
    CAO
    When
    Always
    Rule text CAO.A.030(b)

    (b)secure storage facilities are provided for components, equipment, tools and material, under conditions ensuring that unserviceable components and materials are segregated from all other components, material, equipment and tools, that the manufacturer’s instructions for storage are complied with and that access to the storage facilities is restricted to authorised personnel.

    CAO.A.030(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure the manufacturer’s instructions for storage are complied with.

    When the scope of approval includes maintenance activities.

    Who
    CAO
    When
    Always
    Rule text CAO.A.030(b)

    (b)secure storage facilities are provided for components, equipment, tools and material, under conditions ensuring that unserviceable components and materials are segregated from all other components, material, equipment and tools, that the manufacturer’s instructions for storage are complied with and that access to the storage facilities is restricted to authorised personnel.

    CAO.A.030(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Restrict access to storage facilities to authorised personnel.

    When the scope of approval includes maintenance activities.

    Who
    CAO
    When
    Always
    Rule text CAO.A.030(b)

    (b)secure storage facilities are provided for components, equipment, tools and material, under conditions ensuring that unserviceable components and materials are segregated from all other components, material, equipment and tools, that the manufacturer’s instructions for storage are complied with and that access to the storage facilities is restricted to authorised personnel.

    CAO.A.030(b) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.035Personnel requirements

10 obligations · Rule text

  • Must

    Appoint an accountable manager with authority to ensure all organisational activities can be financed and carried out in accordance with Part-CAO.

    Who
    CAO
    When
    Always
    Rule text CAO.A.035(a)

    (a)The CAO shall appoint an accountable manager, who shall have an authority for ensuring that all activities of the organisation can be financed so that those activities are carried out in accordance with the requirements of this Annex.

    CAO.A.035(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have authority to ensure all organisational activities can be financed so they are carried out in accordance with Part-CAO.

    For the accountable manager.

    Who
    Accountable manager and nominated persons
    When
    Always
    Rule text CAO.A.035(a)

    (a)The CAO shall appoint an accountable manager, who shall have an authority for ensuring that all activities of the organisation can be financed so that those activities are carried out in accordance with the requirements of this Annex.

    CAO.A.035(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Nominate a person or group of persons responsible for ensuring the CAO always complies with Part-CAO.

    For the accountable manager.

    Who
    Accountable manager and nominated persons
    When
    Always
    Rule text CAO.A.035(b)

    (b)The accountable manager shall nominate a person or group of persons who shall be responsible for ensuring that the CAO is always in compliance with the requirements of this Annex. Those person(s) shall ultimately be responsible to the accountable manager.

    CAO.A.035(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure the CAO always complies with the requirements of Part-CAO.

    For the persons nominated under CAO.A.035(b).

    Who
    Accountable manager and nominated persons
    When
    Always
    Rule text CAO.A.035(b)

    (b)The accountable manager shall nominate a person or group of persons who shall be responsible for ensuring that the CAO is always in compliance with the requirements of this Annex. Those person(s) shall ultimately be responsible to the accountable manager.

    CAO.A.035(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Remain ultimately responsible to the accountable manager.

    For the persons nominated under CAO.A.035(b).

    Who
    Accountable manager and nominated persons
    When
    Always
    Rule text CAO.A.035(b)

    (b)The accountable manager shall nominate a person or group of persons who shall be responsible for ensuring that the CAO is always in compliance with the requirements of this Annex. Those person(s) shall ultimately be responsible to the accountable manager.

    CAO.A.035(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have relevant knowledge, background and experience in continuing airworthiness management or maintenance, as appropriate to the functions performed.

    For the persons nominated under CAO.A.035(b).

    Who
    Accountable manager and nominated persons
    When
    Always
    Rule text CAO.A.035(c)

    (c)All persons referred to in point (b) shall have the relevant knowledge, background and experience related to continuing airworthiness management or maintenance, as appropriate for their functions.

    CAO.A.035(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have sufficient appropriately qualified staff to carry out the planned work.

    Who
    CAO
    When
    Always
    Rule text CAO.A.035(d)

    (d)The CAO shall have sufficient appropriately qualified staff for it to be able to carry out the planned work. The CAO shall be entitled to use temporarily subcontracted staff.

    CAO.A.035(d) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Use temporarily subcontracted staff to carry out work.

    Who
    CAO
    When
    Always
    Rule text CAO.A.035(d)

    (d)The CAO shall have sufficient appropriately qualified staff for it to be able to carry out the planned work. The CAO shall be entitled to use temporarily subcontracted staff.

    CAO.A.035(d) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Assess and record the qualifications of all personnel.

    Who
    CAO
    When
    Always
    Rule text CAO.A.035(e)

    (e)The CAO shall assess and record the qualification of all personnel.

    CAO.A.035(e) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have personnel qualified in accordance with an officially-recognised standard.

    For specialised tasks such as welding or NDT inspection other than colour contrast inspections.

    Who
    CAO
    When
    Always
    Rule text CAO.A.035(f)

    (f)Personnel who carry out specialised tasks, such as welding, or non-destructive testing (‘NDT’) inspection other than colour contrast inspections shall be qualified in accordance with an officially-recognised standard

    CAO.A.035(f) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.040Certifying staff

13 obligations · Rule text

  • Must

    Comply with the requirements of Article 5.

    Unless the derogations in CAO.A.040(b) or (c) apply.

    Who
    Certifying staff
    When
    Always
    Rule text CAO.A.040(a)

    (a)Certifying staff shall comply with the requirements of Article 5.

    CAO.A.040(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Exercise maintenance-release privileges only after the CAO has ensured compliance with point 66.A.20(b) of Part-66.

    Unless CAO.A.040(b) or (c) applies, or Article 5(6) refers to a national regulation of a Member State.

    Who
    Certifying staff
    When
    On an event
    Rule text CAO.A.040(a)(1)

    (a)Certifying staff shall comply with the requirements of Article 5. They shall only exercise their privileges to release maintenance if the CAO has ensured: (1) that these certifying staff meet the requirements of point (b) of point 66.A.20 of Annex III (Part-66) except when paragraph 6 of Article 5 refers to a national regulation of a Member State, in which case, they shall meet the requirements of such a regulation; (2) that these certifying staff have an adequate understanding of the relevant aircraft or aircraft component(s) to be maintained, or both, as well as of the organisation procedures required to perform such maintenance.

    CAO.A.040(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Exercise maintenance-release privileges only after the CAO has ensured compliance with the applicable national regulation.

    If Article 5(6) refers to a national regulation of a Member State, unless CAO.A.040(b) or (c) applies.

    Who
    Certifying staff
    When
    On an event
    Rule text CAO.A.040(a)(1)

    (a)Certifying staff shall comply with the requirements of Article 5. They shall only exercise their privileges to release maintenance if the CAO has ensured: (1) that these certifying staff meet the requirements of point (b) of point 66.A.20 of Annex III (Part-66) except when paragraph 6 of Article 5 refers to a national regulation of a Member State, in which case, they shall meet the requirements of such a regulation; (2) that these certifying staff have an adequate understanding of the relevant aircraft or aircraft component(s) to be maintained, or both, as well as of the organisation procedures required to perform such maintenance.

    CAO.A.040(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Exercise maintenance-release privileges only after the CAO has ensured adequate understanding of the relevant aircraft or components, or both, and the organisational procedures required for the maintenance.

    Unless the derogations in CAO.A.040(b) or (c) apply.

    Who
    Certifying staff
    When
    On an event
    Rule text CAO.A.040(a)(2)

    (a)Certifying staff shall comply with the requirements of Article 5. They shall only exercise their privileges to release maintenance if the CAO has ensured: (1) that these certifying staff meet the requirements of point (b) of point 66.A.20 of Annex III (Part-66) except when paragraph 6 of Article 5 refers to a national regulation of a Member State, in which case, they shall meet the requirements of such a regulation; (2) that these certifying staff have an adequate understanding of the relevant aircraft or aircraft component(s) to be maintained, or both, as well as of the organisation procedures required to perform such maintenance.

    CAO.A.040(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue a one-off certification authorisation to an employee holding type qualifications for aircraft of similar technology, construction and systems.

    If unforeseen circumstances involve an aircraft grounded away from the main base without appropriate certifying staff, and the CAO is contracted for maintenance support.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.040(b)(1)

    (b)By derogation from point (a), in unforeseen circumstances where an aircraft is grounded at a location other than the main base where no appropriate certifying staff are available, the CAO contracted to provide maintenance support may issue a one-off certification authorisation, alternatively: (1) to one of their employees holding type qualifications for aircraft of similar technology, construction and systems; (2) to any person with no less than 3 years of maintenance experience and holding a valid ICAO aircraft maintenance licence rated for the aircraft type requiring certification, provided that there is no organisation approved in accordance with this Annex at that location and that the contracted CAO obtains and holds on file evidence of the experience and licence of that person.

    CAO.A.040(b)(1) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue a one-off certification authorisation to a person with at least 3 years’ maintenance experience and a valid ICAO aircraft maintenance licence rated for the aircraft type requiring certification, with experience/licence evidence on file.

    If unforeseen circumstances involve an aircraft grounded away from the main base, without appropriate certifying staff or a Part-CAO-approved organisation there, and the CAO is contracted for maintenance support.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.040(b)(2)

    (b)By derogation from point (a), in unforeseen circumstances where an aircraft is grounded at a location other than the main base where no appropriate certifying staff are available, the CAO contracted to provide maintenance support may issue a one-off certification authorisation, alternatively: (1) to one of their employees holding type qualifications for aircraft of similar technology, construction and systems; (2) to any person with no less than 3 years of maintenance experience and holding a valid ICAO aircraft maintenance licence rated for the aircraft type requiring certification, provided that there is no organisation approved in accordance with this Annex at that location and that the contracted CAO obtains and holds on file evidence of the experience and licence of that person.

    CAO.A.040(b)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Obtain and hold on file evidence of the person’s maintenance experience and licence.

    When issuing a one-off certification authorisation under CAO.A.040(b)(2).

    Who
    CAO
    When
    Always
    Rule text CAO.A.040(b)(2)

    (2)to any person with no less than 3 years of maintenance experience and holding a valid ICAO aircraft maintenance licence rated for the aircraft type requiring certification, provided that there is no organisation approved in accordance with this Annex at that location and that the contracted CAO obtains and holds on file evidence of the experience and licence of that person.

    CAO.A.040(b)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Report issuance of the one-off certification authorisation to the competent authority.

    When issuing a one-off certification authorisation.

    Who
    CAO
    When
    On an event
    Time limit
    within 7 days of issuance
    Rule text CAO.A.040(b)

    The issuance of a one-off certification authorisation shall be reported by the CAO to the competent authority within 7 days of the issuance. The CAO issuing the one-off certification authorisation shall ensure that any such maintenance that could affect flight safety is rechecked.

    CAO.A.040(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure any maintenance under the authorisation that could affect flight safety is rechecked.

    When issuing a one-off certification authorisation.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.040(b)

    The issuance of a one-off certification authorisation shall be reported by the CAO to the competent authority within 7 days of the issuance. The CAO issuing the one-off certification authorisation shall ensure that any such maintenance that could affect flight safety is rechecked.

    CAO.A.040(b) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Use certifying staff meeting the applicable requirements in CAO.A.040(c).

    When providing maintenance support to operators involved in commercial operations, subject to appropriate procedures approved as part of the CAE.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.040(c)

    (c)By derogation from point (a), the CAO may use certifying staff qualified in accordance with the following requirements when providing maintenance support to operators involved in commercial operations, subject to appropriate procedures to be approved as part of the CAE:

    CAO.A.040(c) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue a limited certifying-staff authorisation to the pilot-in-command, based on the flight crew licence held, after ensuring sufficient practical training to accomplish the AD to the required standard.

    When supporting commercial operations under appropriate CAE-approved procedures, for a repetitive preflight AD specifically permitting flight crew accomplishment, by derogation from CAO.A.040(a).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.040(c)(1)

    (c)By derogation from point (a), the CAO may use certifying staff qualified in accordance with the following requirements when providing maintenance support to operators involved in commercial operations, subject to appropriate procedures to be approved as part of the CAE: (1) for a repetitive preflight airworthiness directive (AD) which specifically states that the flight crew may carry out such an AD, the CAO may issue a limited certifying-staff authorisation to the pilot-in-command on the basis of the flight crew licence held, provided that the CAO ensures that sufficient practical training has been carried out by the pilot-in-command so he/she can accomplish the AD to the required standard;

    CAO.A.040(c)(1) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue a limited certifying-staff authorisation to the pilot-in-command, based on the flight crew licence held, after ensuring sufficient practical training to accomplish the task to the required standard.

    When supporting commercial operations under appropriate CAE-approved procedures and the aircraft operates away from a supported location, by derogation from CAO.A.040(a).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.040(c)(2)

    (2)in the case of aircraft operating away from a supported location, the CAO may issue a limited certifying-staff authorisation to the pilot-in-command, on the basis of the flight crew licence held, provided that the organisation ensures that sufficient practical training has been carried out so that such a commander can accomplish the task to the required standard.

    CAO.A.040(c)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Record certifying-staff details and maintain an up-to-date list of all certifying staff and their scope of approval in the CAE.

    Who
    CAO
    When
    Always
    Rule text CAO.A.040(d)

    (d)The CAO shall record the details concerning certifying staff and maintain an up-to-date list of all certifying staff, together with details on their scope of approval, as part of the organisation’s exposition.

    CAO.A.040(d) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.045Airworthiness review staff

8 obligations · Rule text

  • Must

    Have airworthiness review staff with at least 1 year of continuing-airworthiness experience for sailplanes and balloons and at least 3 years for all other aircraft.

    For approval to carry out airworthiness reviews and, if applicable, issue permits to fly.

    Who
    CAO
    When
    Always
    Rule text CAO.A.045(a)(1)

    (a)In order to be approved to carry out airworthiness reviews and, if applicable, to issue permits to fly, the organisation shall have airworthiness review staff that comply with all the following requirements: (1) they have acquired experience in continuing airworthiness of at least 1 year for sailplanes and balloons and of at least 3 years for all other aircraft;

    CAO.A.045(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have airworthiness review staff holding an appropriate Part-66 licence, aeronautical degree or national equivalent, or additional continuing-airworthiness experience beyond CAO.A.045(a)(1) of at least 2 years for sailplanes and balloons or 4 years for all other aircraft.

    For approval to carry out airworthiness reviews and, if applicable, issue permits to fly.

    Who
    CAO
    When
    Always
    Rule text CAO.A.045(a)(2)

    (a)In order to be approved to carry out airworthiness reviews and, if applicable, to issue permits to fly, the organisation shall have airworthiness review staff that comply with all the following requirements: (1) they have acquired experience in continuing airworthiness of at least 1 year for sailplanes and balloons and of at least 3 years for all other aircraft; (2) they hold an appropriate licence in compliance with Annex III (Part-66), or an aeronautical degree or national equivalent, or they have acquired experience in continuing airworthiness in addition to that referred to in point (1) of at least 2 years for sailplanes and balloons and at least 4 years for all other aircraft;

    CAO.A.045(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have airworthiness review staff who have received formal aeronautical maintenance training.

    For approval to carry out airworthiness reviews and, if applicable, issue permits to fly.

    Who
    CAO
    When
    Always
    Rule text CAO.A.045(a)(3)

    (3)they have received formal aeronautical maintenance training.

    CAO.A.045(a)(3) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Perform an airworthiness review under competent-authority supervision or supervision by a person already authorised as review staff by the CAO, in accordance with a competent-authority-approved procedure.

    Before the CAO issues an airworthiness review authorisation to the candidate.

    Who
    Airworthiness review staff
    When
    On an event
    Rule text CAO.A.045(b)

    (b)Before the organisation issues an airworthiness review authorisation to a candidate, that person shall perform an airworthiness review under the supervision of the competent authority or under the supervision of a person that is already authorised as airworthiness review staff by the organisation, in accordance with a procedure approved by the competent authority.

    CAO.A.045(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure airworthiness review staff can demonstrate appropriate recent continuing-airworthiness experience.

    Who
    CAO
    When
    Always
    Rule text CAO.A.045(c)

    (c)The CAO shall ensure that its airworthiness review staff can demonstrate appropriate recent continuing airworthiness experience.

    CAO.A.045(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Identify each airworthiness review staff member in a CAE list containing the airworthiness review authorisation referred to in CAO.A.045(b).

    Who
    CAO
    When
    Always
    Rule text CAO.A.045(d)

    (d)Each airworthiness review staff shall be identified in the CAE in a list that contains the airworthiness review authorisation referred in point (b).

    CAO.A.045(d) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Maintain records of all airworthiness review staff, including appropriate qualifications, summaries of relevant continuing-airworthiness experience and training, and copies of their authorisations.

    Who
    CAO
    When
    Always
    Rule text CAO.A.045(e)

    (e)The CAO shall maintain a record of all its airworthiness review staff, which shall include details of any appropriate qualification and a summary of relevant continuing airworthiness experience and training of the person concerned, as well as a copy of his or her authorisation.

    CAO.A.045(e) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain the record of the airworthiness review staff member.

    When an airworthiness review staff member no longer works for the CAO.

    Who
    CAO
    When
    On an event
    Time limit
    for at least 2 years after the person leaves the CAO
    Rule text CAO.A.045(e)

    (e)The CAO shall maintain a record of all its airworthiness review staff, which shall include details of any appropriate qualification and a summary of relevant continuing airworthiness experience and training of the person concerned, as well as a copy of his or her authorisation. It shall retain that record for a period of at least 2 years after the date at which the person concerned no longer works for the CAO.

    CAO.A.045(e) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.050Components, equipment and tools

5 obligations · Rule text

  • Must

    Hold the equipment and tools specified in the CAO.A.055 maintenance data, or verified equivalents listed in the CAE, necessary for day-to-day maintenance within the approved scope.

    Who
    CAO
    When
    Always
    Rule text CAO.A.050(a)(1)

    (a)The CAO shall: (1) hold the equipment and tools specified in the maintenance data provided for in point CAO.A.055, or verified equivalents as listed in the CAE, as necessary for day-to-day maintenance within the scope of the organisation's approval;

    CAO.A.050(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Have a procedure ensuring access, where needed, to all other equipment and tools necessary for work but used only occasionally.

    Who
    CAO
    When
    Always
    Rule text CAO.A.050(a)(2)

    (2)have a procedure to ensure that it has access to all other equipment and tools necessary to carry out its work, used only on an occasional basis, where needed.

    CAO.A.050(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure tools and equipment used are controlled and calibrated to an officially recognised standard.

    Who
    CAO
    When
    Always
    Rule text CAO.A.050(b)

    (b)The CAO shall ensure that the tools and equipment it uses are controlled and calibrated to an officially recognised standard.

    CAO.A.050(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Keep records of calibrations and the standards used, and comply with CAO.A.090.

    Who
    CAO
    When
    Always
    Rule text CAO.A.050(b)

    It shall keep records of such calibrations and the standards used and comply with point CAO.A.090.

    CAO.A.050(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Inspect, classify and appropriately segregate all incoming components in accordance with M.A.501 and M.A.504 or ML.A.501 and ML.A.504, as applicable.

    When receiving incoming components.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.050(c)

    (c)The CAO shall inspect, classify and appropriately segregate all incoming components in accordance with points M.A.501 and M.A.504 of Annex I (Part-M) or with points ML.A.501 and ML.A.504 of Annex Vb (Part-ML), as applicable.

    CAO.A.050(c) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.055Maintenance data and work orders

3 obligations · Rule text

  • Must

    Hold and use applicable current maintenance data specified in M.A.401 or ML.A.401, as applicable, in performing maintenance, including modifications and repairs.

    Unless the maintenance data is provided by the customer.

    Who
    CAO
    When
    Always
    Rule text CAO.A.055(a)

    (a)The CAO shall hold and use applicable current maintenance data specified in point M.A.401 of Annex I (Part-M) or in point ML.A.401 of Annex Vb (Part-ML), as applicable, in the performance of maintenance, including modifications and repairs. However, in the case of customer-provided maintenance data, it shall only be required to hold such data when the work is in progress.

    CAO.A.055(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Hold and use applicable current maintenance data specified in M.A.401 or ML.A.401, as applicable, including for modifications and repairs.

    When performing maintenance using customer-provided maintenance data.

    Who
    CAO
    When
    On an event
    Time limit
    while the work is in progress
    Rule text CAO.A.055(a)

    (a)The CAO shall hold and use applicable current maintenance data specified in point M.A.401 of Annex I (Part-M) or in point ML.A.401 of Annex Vb (Part-ML), as applicable, in the performance of maintenance, including modifications and repairs. However, in the case of customer-provided maintenance data, it shall only be required to hold such data when the work is in progress.

    CAO.A.055(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Agree a written work order with the person or organisation requesting maintenance, clearly establishing the maintenance to be carried out.

    Before maintenance commences.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.055(b)

    (b)Before the commencement of maintenance, a written work order shall be agreed between the CAO and the person or organisation requesting maintenance, in a manner that clearly establishes the maintenance to be carried out.

    CAO.A.055(b) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.060Maintenance standards

10 obligations · Rule text

  • Must

    Ensure every person performing maintenance is qualified in accordance with Part-CAO.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(a)

    (a)ensure that any person performing maintenance is qualified in accordance with the requirements of this Annex;

    CAO.A.060(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure the maintenance area is well organised and clean, without dirt or contamination.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(b)

    (b)ensure that the area in which maintenance is carried out is well organised and clean (no dirt or contamination);

    CAO.A.060(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Use the methods, techniques, standards and instructions specified in the maintenance data and work orders referred to in CAO.A.055.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(c)

    (c)use the methods, techniques, standards and instructions specified in the maintenance data and work orders referred to in point CAO.A.055;

    CAO.A.060(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Use the tools, equipment and material specified in CAO.A.050.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(d)

    (d)use the tools, equipment and material specified in point CAO.A.050;

    CAO.A.060(d) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure maintenance complies with environmental limitations specified in the maintenance data referred to in CAO.A.055.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(e)

    (e)ensure that maintenance is performed in accordance with any environmental limitations specified in the maintenance data referred to in point CAO.A.055;

    CAO.A.060(e) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure proper facilities are used for the maintenance.

    When performing maintenance in inclement weather or undertaking lengthy maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(f)

    (f)ensure that proper facilities are used in case of inclement weather or lengthy maintenance;

    CAO.A.060(f) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure the risks of multiple maintenance errors and repeated errors in identical maintenance tasks are minimised.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(g)

    (g)ensure that the risk of multiple errors during maintenance and the risk of errors being repeated in identical maintenance tasks are minimised;

    CAO.A.060(g) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure an error-capturing method is implemented.

    After performing any critical maintenance task.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(h)

    (h)ensure that an error-capturing method is implemented after the performance of any critical maintenance task;

    CAO.A.060(h) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Perform a general verification ensuring the aircraft or component is clear of tools, equipment, extraneous parts and material, and all removed access panels have been refitted.

    After completion of maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(i)

    (i)perform a general verification after completion of maintenance in order to ensure that the aircraft or component is clear of all tools, equipment and any extraneous parts and material and that all access panels removed have been refitted;

    CAO.A.060(i) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure all maintenance performed is properly recorded and documented.

    When performing maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.060(j)

    (j)ensure that all maintenance performed is properly recorded and documented.

    CAO.A.060(j) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.065Aircraft certificate of release to service

1 obligation · Rule text

  • Must

    Issue an aircraft CRS in accordance with M.A.801 or ML.A.801, as applicable.

    For aircraft maintenance carried out in accordance with Part-CAO.

    Who
    CAO
    When
    On an event
    Time limit
    at completion of the aircraft maintenance
    Rule text CAO.A.065

    At the completion of any aircraft maintenance carried out in accordance with this Annex, an aircraft CRS shall be issued in accordance with point M.A.801 of Annex I (Part-M) or point ML.A.801 of Annex Vb (Part-ML), as applicable.

    CAO.A.065 · Regulation (EU) No 1321/2014 · verbatim

CAO.A.070Component certificate of release to service

3 obligations · Rule text

  • Must

    Issue a component CRS in accordance with M.A.802 or ML.A.802, as applicable.

    For component maintenance carried out in accordance with Part-CAO.

    Who
    CAO
    When
    On an event
    Time limit
    at completion of all component maintenance
    Rule text CAO.A.070(a)

    (a)At the completion of all component maintenance in accordance with this Annex, a component CRS shall be issued in accordance with point M.A.802 of Annex I (Part-M) or point ML.A.802 of Annex Vb (Part-ML), as applicable.

    CAO.A.070(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Issue an EASA Form 1 in accordance with Appendix II to Part-M.

    For component maintenance under Part-CAO, except as provided in M.A.502(b), M.A.502(d) and ML.A.502, and for components fabricated under CAO.A.020(c).

    Who
    CAO
    When
    On an event
    Time limit
    at completion of all component maintenance
    Rule text CAO.A.070(a)

    (a)At the completion of all component maintenance in accordance with this Annex, a component CRS shall be issued in accordance with point M.A.802 of Annex I (Part-M) or point ML.A.802 of Annex Vb (Part-ML), as applicable. An EASA Form 1 shall be issued in accordance with Appendix II to Annex I (Part-M), except as provided for in points (b) or (d) of point M.A.502 of Annex I (Part-M) and point ML.A.502 of Annex Vb (Part-ML) and for components fabricated in accordance with point (c) of point CAO.A.020.

    CAO.A.070(a) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Generate the EASA Form 1 from a computer database.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.070(b)

    (b)The EASA Form 1 referred to in point (a) may be generated from a computer database.

    CAO.A.070(b) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.075Continuing-airworthiness management

13 obligations · Rule text

  • Must

    Carry out all continuing-airworthiness management in accordance with Subpart C of Part-M or Subpart C of Part-ML, as applicable.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.075(a)

    (a)All continuing airworthiness management shall be carried out in accordance with the requirements of Subpart C of Annex I (Part-M) or Subpart C of Annex Vb (Part-ML), as applicable.

    CAO.A.075(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Develop and control the aircraft’s AMP.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(1)

    (b)For every aircraft managed, the CAO shall: (1) develop and control the AMP for the aircraft managed and:

    CAO.A.075(b)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Approve the AMP and its amendments.

    For managed aircraft complying with Part-ML.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.075(b)(1)(i)

    (i)in the case of aircraft complying with Annex Vb (Part-ML), approve the AMP and its amendments, or

    CAO.A.075(b)(1)(i) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Present the AMP and its amendments to the competent authority for approval.

    For managed aircraft complying with Part-M, unless approval is covered by an indirect approval procedure under M.A.302(c).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.075(b)(1)(ii)

    (ii)in the case of aircraft complying with Annex I (Part-M), present the AMP and its amendments to the competent authority for approval, unless the approval is covered by an indirect approval procedure in accordance with point (c) of point M.A.302 of Annex I (Part-M);

    CAO.A.075(b)(1)(ii) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Provide the owner with a copy of the AMP.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(2)

    (2)provide a copy of the AMP to the owner;

    CAO.A.075(b)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure data used for modifications and repairs complies with M.A.304 or ML.A.304, as applicable.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(3)

    (3)ensure that data used for any modification and repairs complies with points M.A.304 or ML.A.304, as applicable;

    CAO.A.075(b)(3) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure all maintenance follows the AMP and is released in accordance with Section A, Subpart H of Part-M, Section A of Part-145 or Section A, Subpart H of Part-ML, as applicable.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(4)

    (4)ensure that all maintenance is performed in accordance with the AMP and released in accordance with Section A, Subpart H of Annex I (Part-M), Section A of Annex II (Part-145) or Section A, Subpart H of Annex Vb (Part-ML), as applicable;

    CAO.A.075(b)(4) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure all applicable ADs and operational directives with a continuing-airworthiness impact are implemented.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(5)

    (5)ensure that all applicable ADs and all operational directives with a continuing airworthiness impact are implemented;

    CAO.A.075(b)(5) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure all defects discovered during maintenance or reported are corrected by an appropriately approved maintenance organisation or independent certifying staff.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(6)

    (6)ensure that all defects discovered during maintenance or reported are corrected by an appropriately approved maintenance organisation or by independent certifying staff;

    CAO.A.075(b)(6) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure the aircraft is brought for maintenance to an appropriately approved organisation or independent certifying staff whenever necessary.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(7)

    (7)ensure that the aircraft is brought for maintenance to an appropriately approved organisation or to independent certifying staff, whenever necessary;

    CAO.A.075(b)(7) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Coordinate scheduled maintenance, application of ADs, replacement of service-life-limited parts and component inspection to ensure the work is carried out properly.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(8)

    (8)coordinate the scheduled maintenance, application of ADs, replacement of service-life-limited parts and component inspection in order to ensure the work is carried out properly;

    CAO.A.075(b)(8) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Manage and archive all continuing-airworthiness records and, if applicable, the aircraft technical log.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(9)

    (9)manage and archive all continuing-airworthiness records and, if applicable, the aircraft technical log;

    CAO.A.075(b)(9) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Ensure the mass-and-balance statement reflects the current status of the aircraft.

    For every aircraft managed.

    Who
    CAO
    When
    Always
    Rule text CAO.A.075(b)(10)

    (10)ensure that the mass-and-balance statement reflects the current status of the aircraft.

    CAO.A.075(b)(10) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.080Continuing airworthiness management data

2 obligations · Rule text

  • Must

    Hold and use applicable current maintenance data specified in M.A.401 or ML.A.401, as applicable, for the continuing-airworthiness management tasks in CAO.A.075.

    Unless the owner provides the data under a contract specified in CAO.A.080.

    Who
    CAO
    When
    Always
    Rule text CAO.A.080

    The CAO shall hold and use applicable current maintenance data specified in point M.A.401 of Annex I (Part-M) or point ML.A.401 of Annex Vb (Part-ML), as applicable, for the performance of the continuing airworthiness management tasks referred to in point CAO.A.075 of this Annex (Part-CAO). That data may be provided by the owner, subject to a contract as referred in points M.A.201(h)(2) or M.A.201(i)(1) or M.A.201(i)(3) of Annex I (Part-M), or points ML.A.201(e)(1) or ML.A.201(f) of Annex Vb (Part-ML), in which case the CAO only needs to hold such data for the duration of the contract, unless where it is to retain the data pursuant to point CAO.A.090(b) of this Annex (Part-CAO).

    CAO.A.080 · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Hold and use applicable current maintenance data specified in M.A.401 or ML.A.401, as applicable, retaining it longer where CAO.A.090(b) requires.

    When the owner provides the data under M.A.201(h)(2), M.A.201(i)(1), M.A.201(i)(3), ML.A.201(e)(1) or ML.A.201(f) contracts for CAO.A.075 tasks.

    Who
    CAO
    When
    On an event
    Time limit
    for the duration of the contract
    Rule text CAO.A.080

    The CAO shall hold and use applicable current maintenance data specified in point M.A.401 of Annex I (Part-M) or point ML.A.401 of Annex Vb (Part-ML), as applicable, for the performance of the continuing airworthiness management tasks referred to in point CAO.A.075 of this Annex (Part-CAO). That data may be provided by the owner, subject to a contract as referred in points M.A.201(h)(2) or M.A.201(i)(1) or M.A.201(i)(3) of Annex I (Part-M), or points ML.A.201(e)(1) or ML.A.201(f) of Annex Vb (Part-ML), in which case the CAO only needs to hold such data for the duration of the contract, unless where it is to retain the data pursuant to point CAO.A.090(b) of this Annex (Part-CAO).

    CAO.A.080 · Regulation (EU) No 1321/2014 · verbatim

CAO.A.085Airworthiness review

1 obligation · Rule text

  • Must

    Carry out airworthiness reviews in accordance with M.A.903 or ML.A.903, as applicable.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.085

    The CAO shall carry out any airworthiness reviews in accordance with point M.A.903 of Annex I (Part-M) or point ML.A.903 of Annex Vb (Part-ML), as applicable.

    CAO.A.085 · Regulation (EU) No 1321/2014 · verbatim

CAO.A.090Record-keeping

15 obligations · Rule text

  • Must

    Retain maintenance records necessary to demonstrate compliance with all Part-CAO requirements for issuing the CRS, including subcontractor release documents.

    Who
    CAO
    When
    Always
    Rule text CAO.A.090(a)(1)

    (1)the maintenance records necessary to demonstrate that all requirements of this Annex have been met for the issuance of the CRS, including the subcontractor's release documents;

    CAO.A.090(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Provide the aircraft owner with a copy of each CRS and any specific repair or modification data used for the repairs or modifications carried out.

    When issuing a CRS following maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(a)(1)

    the CAO shall provide a copy of each CRS to the owner of the aircraft, together with a copy of any specific repair or modification data used for the repairs or modifications carried out;

    CAO.A.090(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain continuing-airworthiness management records required by M.A.305 and, if applicable, M.A.306, or by ML.A.305.

    Who
    CAO
    When
    Always
    Rule text CAO.A.090(a)(2)

    (2)the continuing airworthiness management records required by any of the following: (i) point M.A.305 and, if applicable, point M.A.306 of Annex I (Part-M); (ii) point ML.A.305 of Annex Vb (Part-ML);

    CAO.A.090(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain a copy of each permit to fly issued and the related documents in accordance with point 21.A.5(c)(2) of Part 21 or point 21L.A.7(c) of Part 21 Light, as applicable.

    When issuing a permit to fly.

    Who
    CAO
    When
    On an event
    Time limit
    for 5 years from the permit’s issue date
    Rule text CAO.A.090(a)(3)

    (3)a copy of each permit to fly that is issued, and the related documents in accordance with the provisions of point 21.A.5(c)(2) of Annex I (Part 21) or, as applicable, point 21L.A.7(c) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012 for a period of 5 years from the date on which the permit to fly was issued;

    CAO.A.090(a)(3) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain a copy of each airworthiness review certificate and recommendation issued, as applicable, together with the airworthiness review report.

    When issuing an airworthiness review certificate or recommendation.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(a)(4)

    (4)a copy of each airworthiness review certificate and recommendation that are issued, as applicable, together with the airworthiness review report;

    CAO.A.090(a)(4) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain a copy of each evaluation programme and evaluation report issued in accordance with point 21.A.174(d) of Part 21 or point 21L.A.143(h) of Part 21 Light, as applicable.

    When issuing an evaluation programme or evaluation report.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(a)(5)

    (5)a copy of each evaluation programme and evaluation report that are issued in accordance with the provisions of point 21.A.174(d) of Annex I (Part 21) or, as applicable, point 21L.A.143(h) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012.

    CAO.A.090(a)(5) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain copies of the records described in CAO.A.090(a)(1) and any associated maintenance data.

    After releasing the aircraft or aircraft component to service.

    Who
    CAO
    When
    On an event
    Time limit
    for 3 years from release to service
    Rule text CAO.A.090(b)

    (b)The CAO shall retain a copy of the records described in point (a)(1), and any associated maintenance data, for a period of 3 years from the date at which it released to service the aircraft or aircraft component to which the work relates.

    CAO.A.090(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain copies of all records referred to in CAO.A.090(a)(4) and (5).

    After transferring continuing-airworthiness management under M.A.201 or ML.A.201, as applicable, to another person or organisation.

    Who
    CAO
    When
    On an event
    Time limit
    for 3 years after the transfer
    Rule text CAO.A.090(c)

    (c)The organisation shall retain a copy of all records referred to in points (a)(4) and (a)(5) of this point for a period of 3 years after the continuing airworthiness management of the aircraft in accordance with point M.A.201 of Annex I (Part-M) or point ML.A.201 of Annex Vb (Part-ML), as applicable, has been transferred to another person or organisation.

    CAO.A.090(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain copies of all records referred to in CAO.A.090(a)(3), (4) and (5), and all supporting documents.

    If issuing an ARC, recommendation, evaluation programme/report or permit to fly as a CAO different from the organisation managing the aircraft’s continuing airworthiness.

    Who
    CAO
    When
    On an event
    Time limit
    for 5 years from the document’s issue date
    Rule text CAO.A.090(c)

    If the organisation issuing the airworthiness review certificate, recommendation, evaluation programme/report or permit to fly is different from the organisation managing the continuing airworthiness of the aircraft, the issuing organisation shall retain a copy of all records referred to in points (a)(3), (a)(4) and (a)(5) and all supporting documents for a period of 5 years from the date on which the airworthiness review certificate, recommendation, evaluation programme/report or permit to fly was issued.

    CAO.A.090(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Store all records in a manner protecting them from damage, alteration and theft.

    Who
    CAO
    When
    Always
    Rule text CAO.A.090(d)

    (d)All records shall be stored in a manner that ensures protection from damage, alteration and theft.

    CAO.A.090(d) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Store all hardware used to back up maintenance records separately from the location containing the data, in an environment ensuring good condition.

    Who
    CAO
    When
    Always
    Rule text CAO.A.090(e)

    (e)All computer hardware used for backup of the maintenance records shall be stored in a different location from that containing those data and in an environment that ensures that they remain in good condition.

    CAO.A.090(e) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Transfer all records retained under CAO.A.090(a)(2) to (5) to the receiving organisation or person.

    When transferring an aircraft’s continuing-airworthiness management to another organisation or person.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(f)

    (f)When the continuing airworthiness management of an aircraft is transferred to another organisation or person, all the records retained under points (a)(2) to (a)(5) shall be transferred to that organisation or person. From the moment of the transfer, point (c) shall apply to that organisation or person.

    CAO.A.090(f) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Apply CAO.A.090(c) from the moment of the transfer.

    When continuing-airworthiness management of an aircraft is transferred to the CAO.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(f)

    (f)When the continuing airworthiness management of an aircraft is transferred to another organisation or person, all the records retained under points (a)(2) to (a)(5) shall be transferred to that organisation or person. From the moment of the transfer, point (c) shall apply to that organisation or person.

    CAO.A.090(f) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Transfer CAO.A.090(a)(1) records to the last owner or customer of the respective aircraft or component, or store them as specified by the competent authority.

    When terminating the CAO’s operation.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(g)(1)

    (g)Where the CAO terminates its operation, all retained records shall be transferred as follows: (1) the records referred to in point (a)(1) shall be transferred to the last owner or customer of the respective aircraft or component or shall be stored as specified by the competent authority;

    CAO.A.090(g)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Transfer the records referred to in CAO.A.090(a)(2) to (5) to the aircraft owner.

    When terminating the CAO’s operation.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.090(g)(2)

    (g)Where the CAO terminates its operation, all retained records shall be transferred as follows: (1) the records referred to in point (a)(1) shall be transferred to the last owner or customer of the respective aircraft or component or shall be stored as specified by the competent authority; (2) the records referred to in point (a)(2) to (a)(5) shall be transferred to the owner of the aircraft.

    CAO.A.090(g)(2) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.095Privileges of the organisation

18 obligations · Rule text

  • May

    Maintain aircraft or components for which the CAO is approved, at the locations specified in the approval certificate and the CAE.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(a)(1)

    (1)Maintain any aircraft or component for which it is approved at the locations specified in the approval certificate and the CAE.

    CAO.A.095(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Arrange specialised services at another appropriately qualified organisation under the CAO’s control, in accordance with appropriate CAE procedures approved by the competent authority.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(a)(2)

    (2)Arrange for the performance of specialised services at another organisation appropriately qualified under the control of the CAO, in accordance with the appropriate procedures set out in the CAE and approved by the competent authority.

    CAO.A.095(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Maintain aircraft or components for which the CAO is approved at any location, in accordance with the conditions specified in the CAE.

    When maintenance is needed because of aircraft unserviceability or to support occasional maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(a)(3)

    (3)Maintain any aircraft or component for which it is approved at any location, where the need of such maintenance arises either from the unserviceability of the aircraft or the need for supporting occasional maintenance, in accordance with the conditions specified in the CAE.

    CAO.A.095(a)(3) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue certificates of release to service in accordance with CAO.A.065 or CAO.A.070.

    After completion of maintenance.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(a)(4)

    (4)Issue certificates of release to service upon completion of maintenance, in accordance with point CAO.A.065 or CAO.A.070.

    CAO.A.095(a)(4) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Manage the continuing airworthiness of aircraft for which the CAO is approved.

    Who
    CAO
    When
    Always
    Rule text CAO.A.095(b)(1)

    (1)Manage the continuing airworthiness of any aircraft for which it is approved.

    CAO.A.095(b)(1) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Approve the AMP in accordance with ML.A.302(b)(2).

    For aircraft managed in accordance with Part-ML.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(b)(2)

    (2)Approve the AMP, in accordance with point (b)(2) of point ML.A.302, for aircraft managed in accordance with Annex Vb (Part-ML).

    CAO.A.095(b)(2) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Carry out limited continuing-airworthiness tasks with contracted organisations working under the CAO’s quality system, as listed on the approval certificate.

    Who
    CAO
    When
    Always
    Rule text CAO.A.095(b)(3)

    (3)Carry out limited continuing airworthiness tasks with any contracted organisation working under their quality system, as listed on the approval certificate.

    CAO.A.095(b)(3) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Extend an existing ARC’s validity in accordance with M.A.902(a) or ML.A.902(a), as applicable.

    If the conditions in M.A.902(b) or ML.A.902(b), as applicable, are met.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(b)(4)

    (4)Extend the validity of an existing airworthiness review certificate in accordance with point M.A.902(a) of Annex I (Part-M) or point ML.A.902(a) of Annex Vb (Part-ML), as applicable, subject to the conditions set out in point M.A.902(b) of Annex I (Part-M) or point ML.A.902(b) of Annex Vb (Part-ML), as applicable.

    CAO.A.095(b)(4) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Obtain approval to carry out airworthiness reviews in accordance with M.A.903 or ML.A.903, as applicable.

    For a CAO with its principal place of business in a Member State and approval including CAO.A.095(b) privileges.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(1)

    (1)A CAO with its principal place of business in a Member State, the approval of which includes the privileges referred to in point (b) of this point, may be approved to carry out airworthiness reviews in accordance with point M.A.903 of Annex I (Part-M) or point ML.A.903 of Annex Vb (Part-ML), as applicable, and:

    CAO.A.095(c)(1) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue the related ARC under M.A.901(b)(1) or in accordance with ML.A.901(b), as applicable.

    When approved under CAO.A.095(c)(1) to carry out the airworthiness review.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(1)(i)

    (1)A CAO with its principal place of business in a Member State, the approval of which includes the privileges referred to in point (b) of this point, may be approved to carry out airworthiness reviews in accordance with point M.A.903 of Annex I (Part-M) or point ML.A.903 of Annex Vb (Part-ML), as applicable, and: (i) issue the related airworthiness review certificate under the conditions set out in point M.A.901(b)(1) of Annex I (Part-M) or in accordance with point ML.A.901(b) of Annex Vb (Part-ML), as applicable; (ii) issue a recommendation for the issuance of an airworthiness review certificate to the competent authority of the Member State of registry, under the conditions set out in point M.A.901(b)(2) of Annex I (Part-M).

    CAO.A.095(c)(1)(i) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Issue a recommendation for ARC issuance to the competent authority of the Member State of registry, under the conditions in M.A.901(b)(2).

    When approved under CAO.A.095(c)(1) to carry out the airworthiness review.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(1)(ii)

    (1)A CAO with its principal place of business in a Member State, the approval of which includes the privileges referred to in point (b) of this point, may be approved to carry out airworthiness reviews in accordance with point M.A.903 of Annex I (Part-M) or point ML.A.903 of Annex Vb (Part-ML), as applicable, and: (i) issue the related airworthiness review certificate under the conditions set out in point M.A.901(b)(1) of Annex I (Part-M) or in accordance with point ML.A.901(b) of Annex Vb (Part-ML), as applicable; (ii) issue a recommendation for the issuance of an airworthiness review certificate to the competent authority of the Member State of registry, under the conditions set out in point M.A.901(b)(2) of Annex I (Part-M).

    CAO.A.095(c)(1)(ii) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Obtain approval to carry out airworthiness reviews in accordance with ML.A.903 and issue the related ARC.

    For a CAO with its principal place of business in a Member State and approval including CAO.A.095(a) privileges.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(2)

    (2)A CAO with its principal place of business in one of the Member States, the approval of which includes the privileges referred to in point (a), may be approved to carry out airworthiness reviews in accordance with point ML.A.903 of Annex Vb (Part-ML) and issue the related ARC.

    CAO.A.095(c)(2) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Obtain additional approval to develop an evaluation programme in accordance with point 21.A.174(d)(3) of Part 21 or point 21L.A.143(h)(3) of Part 21 Light, as applicable.

    For aircraft the CAO is approved to review, with CAO.A.095(c)(1) or (2) privileges and an adequate CAE procedure.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(3)(i)

    (3)A CAO holding the privileges referred to in point (1) or point (2) may additionally, for the aircraft for which the organisation is approved to carry out the airworthiness review, and subject to an adequate procedure in the CAE referred to in point CAO.A.025, be approved to: (i) develop an evaluation programme in accordance with point 21.A.174(d)(3) of Annex I (Part 21) or, as applicable, point 21L.A.143(h)(3) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012; (ii) conduct the investigations activities proposed in the evaluation programme and issue the evaluation report in accordance with point 21.A.174(d)(4) of Annex I (Part 21) or, as applicable, point 21L.A.143(h)(4) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012.

    CAO.A.095(c)(3)(i) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Obtain additional approval to conduct the investigation activities proposed in the evaluation programme and issue the evaluation report under point 21.A.174(d)(4) of Part 21 or point 21L.A.143(h)(4) of Part 21 Light, as applicable.

    For aircraft the CAO is approved to review, with CAO.A.095(c)(1) or (2) privileges and an adequate CAE procedure.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(3)(ii)

    (3)A CAO holding the privileges referred to in point (1) or point (2) may additionally, for the aircraft for which the organisation is approved to carry out the airworthiness review, and subject to an adequate procedure in the CAE referred to in point CAO.A.025, be approved to: (i) develop an evaluation programme in accordance with point 21.A.174(d)(3) of Annex I (Part 21) or, as applicable, point 21L.A.143(h)(3) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012; (ii) conduct the investigations activities proposed in the evaluation programme and issue the evaluation report in accordance with point 21.A.174(d)(4) of Annex I (Part 21) or, as applicable, point 21L.A.143(h)(4) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012.

    CAO.A.095(c)(3)(ii) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Use staff approved to carry out airworthiness reviews for that aircraft.

    When performing the evaluation-programme and investigation/report tasks in CAO.A.095(c)(3)(i) and (ii).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(c)(3)

    Tasks referred to in the first paragraph, points (i) and (ii), shall be performed by staff who are approved to carry out airworthiness review for that aircraft.

    CAO.A.095(c)(3) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Obtain approval to issue permits to fly under point 21.A.711(d), for aircraft for which the CAO can issue the ARC, when attesting conformity with approved flight conditions and subject to an adequate CAE procedure.

    For a CAO with its principal place of business in a Member State and approval including CAO.A.095(c)(1) or (2) privileges.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(d)

    A CAO with its principal place of business in one of the Member States, the approval of which includes the privileges referred to in point (c)(1) or point (c)(2) of this point, may be approved to issue a permit to fly in accordance with point 21.A.711(d) of Annex I (Part 21) to Regulation (EU) No 748/2012 for those aircraft for which the CAO can issue the airworthiness review certificate when it attests conformity with the approved flight conditions, subject to an adequate procedure in the CAE referred to in point CAO.A.025 of this Annex.

    CAO.A.095(d) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Issue the permit to fly only when M.A.902(b)(1) and M.A.902(b)(2) are met and the issuing CAO manages the aircraft’s continuing airworthiness.

    For aircraft above 2 730 kg MTOM.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(d)

    In addition, in the case of aircraft above 2 730 kg MTOM, that permit to fly may be issued provided that: (i) the conditions referred to in points M.A.902(b)(1) and M.A.902(b)(2) of Annex I (Part-M) are met; (ii) the continuing airworthiness of the aircraft is managed by the CAO issuing the permit to fly.

    CAO.A.095(d) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Obtain approval for one or more CAO privileges.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.095(e)

    (e)A CAO may be approved for one or more privileges.

    CAO.A.095(e) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.100Quality system and organisational review

7 obligations · Rule text

  • Must

    Establish a quality system to ensure continued compliance with Part-CAO.

    Unless the quality system is replaced by regular organisational reviews under CAO.A.100(f).

    Who
    CAO
    When
    Always
    Rule text CAO.A.100(a)

    (a)To ensure that the CAO continues to meet the requirements of this Annex, this organisation shall establish a quality system and designate a quality manager.

    CAO.A.100(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Designate a quality manager to ensure continued compliance with Part-CAO.

    Who
    CAO
    When
    Always
    Rule text CAO.A.100(a)

    (a)To ensure that the CAO continues to meet the requirements of this Annex, this organisation shall establish a quality system and designate a quality manager.

    CAO.A.100(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Monitor all Part-CAO activities, particularly compliance with approved procedures, performance of contracted maintenance in accordance with the contract, and continued compliance with Part-CAO.

    Unless the quality system is replaced by regular organisational reviews under CAO.A.100(f).

    Who
    CAO
    When
    Always
    Rule text CAO.A.100(b)

    (b)The quality system shall monitor the carrying out of the activities of the organisation covered by this Annex. It shall monitor in particular: (1) that all those activities are performed in accordance with the approved procedures; (2) that all contracted maintenance tasks are carried out in accordance with the contract; (3) that the organisation continues to comply with the requirements of this Annex.

    CAO.A.100(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Retain records of monitoring performed by the quality system.

    Who
    CAO
    When
    Always
    Time limit
    for at least the previous 2 years
    Rule text CAO.A.100(c)

    (c)The records of that monitoring shall be retained for at least the previous 2 years.

    CAO.A.100(c) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Combine the quality system with that required by the other Annex.

    If the CAO is additionally approved under another Annex.

    Who
    CAO
    When
    Always
    Rule text CAO.A.100(d)

    (d)Where the organisation holding a CAO approval is additionally approved in accordance with an Annex other than this Annex, the quality system may be combined with that required by the other Annex.

    CAO.A.100(d) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Replace the quality system with regular organisational reviews.

    For a small CAO as defined in CAO.A.100(e), subject to competent-authority approval.

    Who
    CAO
    When
    Periodically
    Rule text CAO.A.100(f)

    (f)In the case of a small CAO, the quality system may be replaced by regular organisational reviews, subject to the approval of the competent authority. In that case, the CAO shall not contract continuing airworthiness management tasks to other parties.

    CAO.A.100(f) · Regulation (EU) No 1321/2014 · verbatim

  • Must not

    Contract continuing-airworthiness management tasks to other parties.

    If a small CAO replaces its quality system with regular organisational reviews under CAO.A.100(f).

    Who
    CAO
    When
    Always
    Rule text CAO.A.100(f)

    (f)In the case of a small CAO, the quality system may be replaced by regular organisational reviews, subject to the approval of the competent authority. In that case, the CAO shall not contract continuing airworthiness management tasks to other parties.

    CAO.A.100(f) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.105Changes to the organisation

7 obligations · Rule text

  • Must

    Notify the competent authority of proposed changes affecting the approval-certificate information in Appendix I and the terms of approval.

    Who
    CAO
    When
    On an event
    Time limit
    before the changes take place
    Rule text CAO.A.105(a)(1)

    (a)In order to enable the competent authority to determine continued compliance with this Annex, the CAO shall notify the competent authority of any proposal to carry out any of the following changes, before such changes take place: (1) changes affecting the information contained in the approval certificate laid down in Appendix I and the terms of approval of this Annex;

    CAO.A.105(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Notify the competent authority of proposed changes of the persons referred to in CAO.A.035(a) and (b).

    Who
    CAO
    When
    On an event
    Time limit
    before the changes take place
    Rule text CAO.A.105(a)(2)

    (a)In order to enable the competent authority to determine continued compliance with this Annex, the CAO shall notify the competent authority of any proposal to carry out any of the following changes, before such changes take place: (1) changes affecting the information contained in the approval certificate laid down in Appendix I and the terms of approval of this Annex; (2) changes of the persons referred to in points CAO.A.035(a) and (b);

    CAO.A.105(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Notify the competent authority of proposed changes in aircraft types covered by the scope of work under CAO.A.020(a)(1).

    For aeroplanes above 2 730 kg MTOM, helicopters above 1 200 kg MTOM or certified for more than four occupants, and other aircraft that are not ELA2.

    Who
    CAO
    When
    On an event
    Time limit
    before the changes take place
    Rule text CAO.A.105(a)(3)

    (a)In order to enable the competent authority to determine continued compliance with this Annex, the CAO shall notify the competent authority of any proposal to carry out any of the following changes, before such changes take place: (1) changes affecting the information contained in the approval certificate laid down in Appendix I and the terms of approval of this Annex; (2) changes of the persons referred to in points CAO.A.035(a) and (b); (3) changes in the aircraft types covered by the scope of work referred to in point (a)(1) of point CAO.A.020 in the case of aeroplanes of more than 2 730 kg maximum take-off mass (MTOM), helicopters of more than 1 200 kg MTOM or certified for more than four occupants and for any other aircraft which is not an ELA2;

    CAO.A.105(a)(3) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Notify the competent authority of proposed scope-of-work changes under CAO.A.020(a)(2).

    For engines other than piston or electric.

    Who
    CAO
    When
    On an event
    Time limit
    before the changes take place
    Rule text CAO.A.105(a)(4)

    (a)In order to enable the competent authority to determine continued compliance with this Annex, the CAO shall notify the competent authority of any proposal to carry out any of the following changes, before such changes take place: (1) changes affecting the information contained in the approval certificate laid down in Appendix I and the terms of approval of this Annex; (2) changes of the persons referred to in points CAO.A.035(a) and (b); (3) changes in the aircraft types covered by the scope of work referred to in point (a)(1) of point CAO.A.020 in the case of aeroplanes of more than 2 730 kg maximum take-off mass (MTOM), helicopters of more than 1 200 kg MTOM or certified for more than four occupants and for any other aircraft which is not an ELA2; (4) changes in the scope of work referred to in point (a)(2) of CAO.A.020 in the case of engines other than piston or electric;

    CAO.A.105(a)(4) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Notify the competent authority of proposed changes in the control procedure under CAO.A.105(b).

    Who
    CAO
    When
    On an event
    Time limit
    before the changes take place
    Rule text CAO.A.105(a)(5)

    the CAO shall notify the competent authority of any proposal to carry out any of the following changes, before such changes take place: (1) changes affecting the information contained in the approval certificate laid down in Appendix I and the terms of approval of this Annex; (2) changes of the persons referred to in points CAO.A.035(a) and (b); (3) changes in the aircraft types covered by the scope of work referred to in point (a)(1) of point CAO.A.020 in the case of aeroplanes of more than 2 730 kg maximum take-off mass (MTOM), helicopters of more than 1 200 kg MTOM or certified for more than four occupants and for any other aircraft which is not an ELA2; (4) changes in the scope of work referred to in point (a)(2) of CAO.A.020 in the case of engines other than piston or electric; (5) changes in the control procedure set out in point (b) of this point.

    CAO.A.105(a)(5) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Control changes in locations, facilities, equipment, tools, material, procedures, scope of work and staff through a control procedure provided for in the CAE.

    For changes other than those covered by CAO.A.105(a).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.105(b)

    (b)Any other changes in locations, facilities, equipment, tools, material, procedures, scope of work and staff shall be controlled by the CAO through a control procedure provided for in the CAE. The CAO shall submit a description of those changes and the corresponding CAE amendments to the competent authority within 15 days from the day on which the change took place.

    CAO.A.105(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Submit a description of the changes and corresponding CAE amendments to the competent authority.

    When changes covered by CAO.A.105(b) take place.

    Who
    CAO
    When
    On an event
    Time limit
    within 15 days from the day the change took place
    Rule text CAO.A.105(b)

    (b)Any other changes in locations, facilities, equipment, tools, material, procedures, scope of work and staff shall be controlled by the CAO through a control procedure provided for in the CAE. The CAO shall submit a description of those changes and the corresponding CAE amendments to the competent authority within 15 days from the day on which the change took place.

    CAO.A.105(b) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.110Continued validity

3 obligations · Rule text

  • Must

    Remain in compliance with Part-CAO, particularly the handling of findings in accordance with CAO.A.115.

    For continued validity of the approval.

    Who
    CAO
    When
    Always
    Rule text CAO.A.110(a)(1)

    (a)An approval shall be issued for an unlimited duration and shall remain valid subject to: (1) the organisation remaining in compliance with the requirements of this Annex, in particular how the findings are handled in accordance with point CAO.A.115; (2) the competent authority being granted access to the organisation to determine continued compliance with the requirements of this Annex; (3) the competent authority not having surrendered or revoked the approval.

    CAO.A.110(a)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Grant the competent authority access to determine continued compliance with Part-CAO.

    For continued validity of the approval.

    Who
    CAO
    When
    Always
    Rule text CAO.A.110(a)(2)

    (a)An approval shall be issued for an unlimited duration and shall remain valid subject to: (1) the organisation remaining in compliance with the requirements of this Annex, in particular how the findings are handled in accordance with point CAO.A.115; (2) the competent authority being granted access to the organisation to determine continued compliance with the requirements of this Annex; (3) the competent authority not having surrendered or revoked the approval.

    CAO.A.110(a)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Return the approval certificate to the competent authority.

    When the approval is surrendered or revoked.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.110(b)

    (b)Upon surrender or revocation of the approval, the organisation shall return the approval certificate to the competent authority.

    CAO.A.110(b) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.115Findings

2 obligations · Rule text

  • Must

    Adopt a corrective action plan to address the finding.

    After receiving notification of a finding in accordance with CAO.B.060.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.115(c)

    (c)After receiving a notification of a finding in accordance with point CAO.B.060, the CAO shall adopt a corrective action plan and demonstrate to the satisfaction of the competent authority that it has taken the necessary corrective action to address the finding within the time period set by that authority.

    CAO.A.115(c) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Demonstrate to the competent authority’s satisfaction that the necessary corrective action has been taken to address the finding.

    After receiving notification of a finding in accordance with CAO.B.060.

    Who
    CAO
    When
    On an event
    Time limit
    within the time period set by the competent authority
    Rule text CAO.A.115(c)

    (c)After receiving a notification of a finding in accordance with point CAO.B.060, the CAO shall adopt a corrective action plan and demonstrate to the satisfaction of the competent authority that it has taken the necessary corrective action to address the finding within the time period set by that authority.

    CAO.A.115(c) · Regulation (EU) No 1321/2014 · verbatim

CAO.A.120Occurrence reporting

11 obligations · Rule text

  • Must

    Establish and maintain an occurrence reporting system including mandatory and voluntary reporting.

    Who
    CAO
    When
    Always
    Rule text CAO.A.120(a)

    (a)The organisation shall establish and maintain an occurrence reporting system, including mandatory and voluntary reporting.

    CAO.A.120(a) · Regulation (EU) No 1321/2014 · verbatim

  • May

    Establish a single occurrence reporting system meeting Regulation (EU) No 376/2014 and Regulation (EU) 2018/1139, and their respective delegated and implementing acts.

    For a CAO with its principal place of business in a Member State.

    Who
    CAO
    When
    Always
    Rule text CAO.A.120(a)

    (a)The organisation shall establish and maintain an occurrence reporting system, including mandatory and voluntary reporting. For organisations that have their principal place of business in a Member State, a single system may be established to meet the requirements of Regulation (EU) No 376/2014 and its delegated and implementing acts and of Regulation (EU) 2018/1139 and its delegated and implementing acts.

    CAO.A.120(a) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Report the event or condition, particularly any accident or serious incident, to the competent authority and the organisation responsible for the aircraft or component design.

    When identifying an aircraft/component safety-related event or condition that endangers, or if uncorrected or unaddressed could endanger, an aircraft, its occupants or another person.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(b)

    (b)The organisation shall report to its competent authority and to the organisation responsible for the design of the aircraft or component any safety-related event or condition of an aircraft or component identified by the organisation which endangers or, if not corrected or addressed, could endanger an aircraft, its occupants or any other person, and in particular any accident or serious incident.

    CAO.A.120(b) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Report the event or condition to the aircraft owner or operator.

    When an event or condition under CAO.A.120(b) is identified while managing continuing airworthiness under M.A.201 or ML.A.201, as applicable.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(c)(1)

    (c)The organisation shall also report any such event or condition that affects an aircraft or component, as applicable: (1) to the owner or operator of that aircraft, when such event or condition was identified while managing the continuing airworthiness in accordance with point M.A.201 of Annex I (Part-M) or point ML.A.201 of Annex Vb (Part-ML), as applicable;

    CAO.A.120(c)(1) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Report the event or condition to the person or organisation responsible for the aircraft’s continuing airworthiness under M.A.201 or ML.A.201, as applicable.

    When an event or condition under CAO.A.120(b) is identified during continuing-airworthiness activities requested by that responsible person or organisation.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(c)(2)

    (c)The organisation shall also report any such event or condition that affects an aircraft or component, as applicable: (1) to the owner or operator of that aircraft, when such event or condition was identified while managing the continuing airworthiness in accordance with point M.A.201 of Annex I (Part-M) or point ML.A.201 of Annex Vb (Part-ML), as applicable; (2) to the person or organisation that is responsible for the continuing airworthiness of that aircraft in accordance with point M.A.201 of Annex I (Part-M) or point ML.A.201 of Annex Vb (Part-ML), as applicable, when such event or condition was identified while carrying out continuing airworthiness activities requested by that person or organisation;

    CAO.A.120(c)(2) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Report the event or condition to the person or organisation that requested the component maintenance.

    When identifying an event or condition under CAO.A.120(b) during component maintenance, if the requester differs from the person or organisation in CAO.A.120(c)(2).

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(c)(3)

    (3)to the person or organisation that requested the component maintenance, if different from point (2), when such event or condition was identified while carrying out component maintenance.

    CAO.A.120(c)(3) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Appropriately safeguard the confidentiality of the reporter’s identity and the identities of persons mentioned in the report.

    For initial mandatory reports by a CAO without its principal place of business in a Member State.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(d)(1)(i)

    (d)For organisations that do not have their principal place of business in a Member State: (1) the initial mandatory report shall: (i) appropriately safeguard the confidentiality of the identity of the reporter and of the persons mentioned in the report; (ii) be made as soon as practicable, but in any case, within 72 hours after the organisation has become aware of the occurrence unless exceptional circumstances prevent that; (iii) be made in a form and manner established by the competent authority; (iv) contain all pertinent information about the condition known to the organisation;

    CAO.A.120(d)(1)(i) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Make the initial mandatory report as soon as practicable after becoming aware of the occurrence.

    For a CAO without its principal place of business in a Member State, unless exceptional circumstances prevent reporting within the deadline.

    Who
    CAO
    When
    On an event
    Time limit
    within 72 hours after becoming aware of the occurrence
    Rule text CAO.A.120(d)(1)(ii)

    (d)For organisations that do not have their principal place of business in a Member State: (1) the initial mandatory report shall: (i) appropriately safeguard the confidentiality of the identity of the reporter and of the persons mentioned in the report; (ii) be made as soon as practicable, but in any case, within 72 hours after the organisation has become aware of the occurrence unless exceptional circumstances prevent that; (iii) be made in a form and manner established by the competent authority; (iv) contain all pertinent information about the condition known to the organisation;

    CAO.A.120(d)(1)(ii) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Make the report in the form and manner established by the competent authority.

    For initial mandatory reports by a CAO without its principal place of business in a Member State.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(d)(1)(iii)

    (d)For organisations that do not have their principal place of business in a Member State: (1) the initial mandatory report shall: (i) appropriately safeguard the confidentiality of the identity of the reporter and of the persons mentioned in the report; (ii) be made as soon as practicable, but in any case, within 72 hours after the organisation has become aware of the occurrence unless exceptional circumstances prevent that; (iii) be made in a form and manner established by the competent authority; (iv) contain all pertinent information about the condition known to the organisation;

    CAO.A.120(d)(1)(iii) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Include all pertinent information about the condition known to the CAO.

    For initial mandatory reports by a CAO without its principal place of business in a Member State.

    Who
    CAO
    When
    On an event
    Rule text CAO.A.120(d)(1)(iv)

    (d)For organisations that do not have their principal place of business in a Member State: (1) the initial mandatory report shall: (i) appropriately safeguard the confidentiality of the identity of the reporter and of the persons mentioned in the report; (ii) be made as soon as practicable, but in any case, within 72 hours after the organisation has become aware of the occurrence unless exceptional circumstances prevent that; (iii) be made in a form and manner established by the competent authority; (iv) contain all pertinent information about the condition known to the organisation;

    CAO.A.120(d)(1)(iv) · Regulation (EU) No 1321/2014 · verbatim

  • Must

    Send a follow-up report to the entities in CAO.A.120(b) and (c) that received the initial report, detailing intended preventive actions, in the form and manner established by the competent authority.

    For a CAO without its principal place of business in a Member State, when a follow-up report is relevant.

    Who
    CAO
    When
    On an event
    Time limit
    as soon as those actions have been identified
    Rule text CAO.A.120(d)(2)

    (2)where relevant, a follow-up report that provides details of the actions that the organisation intends to take to prevent similar occurrences in the future shall be made as soon as those actions have been identified; those follow-up reports shall: (i) be sent to the entities referred to in points (b) and (c) to which the initial report was sent; (ii) be made in a form and manner established by the competent authority.

    CAO.A.120(d)(2) · Regulation (EU) No 1321/2014 · verbatim

2 rules and appendices set no obligation
  • CAO.A.010

    Scope — Scope statement defining the activities and aircraft covered; sets no separate duty, permission or prohibition.

  • Appendix I

    Combined airworthiness organisation (CAO) certificate - EASA Form 3-CAO — Certificate and terms-of-approval template, including rating explanations; excluded as instructed.

  • Written from the implementing rules of Regulation (EU) No 1321/2014 — Section A and the appendices that set requirements — as amended up to Implementing Regulation (EU) 2026/100.
  • Every quoted sentence was checked word for word against that text on 2 Nov 2026.
  • AMC and GM are not included: they show ways to comply; this list is what the rule itself requires. Section B, what the competent authority does, is not included.
  • A summary can lose a nuance. The rule text binds, together with your approved exposition and your competent authority. Not the official publication — verify against the Official Journal of the European Union before operational use.
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