--- title: "3.2 Practical element — Part-66 · Avioverse" description: "Objective: The objective of practical training is to gain the required competence in performing safe maintenance, inspections and routine work according…" url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-annex-iii-part-66/3-2" --- # 3.2 Practical element Annex III (Part-66) · Regulation (EU) No 1321/2014 · EAR revision 2 Sep 2025 IR Implementing rule ## 3.2 Practical element (a) Objective: The objective of practical training is to gain the required competence in performing safe [maintenance](https://avioverse.aero/glossary/easa/maintenance), inspections and routine work according to the maintenance manual and other relevant instructions and tasks as appropriate for the type of [aircraft](https://avioverse.aero/glossary/easa/aircraft), for example troubleshooting, repairs, adjustments, replacements, rigging and functional checks. It includes the awareness of the use of all technical literature and documentation for the aircraft, the use of specialist/special tooling and test equipment for performing removal and replacement of components and modules unique to type, including any on-wing maintenance activity. (b) Content: At least 50 % of the crossed items in the table below, which are relevant to the particular aircraft type, shall be completed as part of the practical training. Tasks crossed represent subjects that are important for practical training purposes to ensure that the operation, function, installation and safety significance of key maintenance tasks is adequately addressed; particularly where these cannot be fully explained by theoretical training alone. Although the list details the minimum practical training subjects, other items may be added where applicable to the particular aircraft type. Tasks to be completed shall be representative of the aircraft and systems both in complexity and in the technical input required to complete that task. While relatively simple tasks may be included, other more complex tasks shall also be incorporated and undertaken as appropriate to the aircraft type. If it exists, the minimum list of practical tasks of the operational suitability data (OSD), established in accordance with Regulation (EU) No 748/2012, shall be part of the practical elements to be selected. Glossary of the table: LOC: Location; FOT: Functional/Operational Test; SGH: Service and Ground Handling; R/I: Removal/Installation; MEL: Minimum Equipment List; TS: TroubleShooting. | Chapters | B1/B2 | B1 | | | | | B2 | | | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --- | --- | --- | --- | -- | --- | --- | --- | --- | -- | | | LOC | FOT | SGH | R/I | MEL | TS | FOT | SGH | R/I | MEL | TS | | Introduction module: | | | | | | | | | | | | | 5 Time limits/maintenance checks | X/X | — | — | — | — | — | — | — | — | — | — | | 6 Dimensions/Areas (MTOM, etc.) | X/X | — | — | — | — | — | — | — | — | — | — | | 7 Lifting and Shoring | X/X | — | — | — | — | — | — | — | — | — | — | | 8 Levelling and weighing | X/X | — | X | — | — | — | — | X | — | — | — | | 9 Towing and taxiing | X/X | — | X | — | — | — | — | X | — | — | — | | 10 Parking/mooring, Storing and Return to Service | X/X | — | X | — | — | — | — | X | — | — | — | | 11 Placards and Markings | X/X | — | — | — | — | — | — | — | — | — | — | | 12 Servicing | X/X | — | X | — | — | — | — | X | — | — | — | | 20 Standard practices — only type particular | X/X | — | X | — | — | — | — | X | — | — | — | | Helicopters: | | | | | | | | | | | | | 18 Vibration and Noise Analysis (Blade tracking) | X/— | — | — | — | — | X | — | — | — | — | — | | 60 Standard Practices Rotor — only type specific | X/X | — | X | — | — | — | — | X | — | — | — | | 62 Rotors | X/— | — | X | X | — | X | — | — | — | — | — | | 62A Rotors — Monitoring and indicating | X/X | X | X | X | X | X | — | — | X | — | X | | 63 Rotor Drives | X/— | X | — | — | — | X | — | — | — | — | — | | 63A Rotor Drives — Monitoring and indicating | X/X | X | — | X | X | X | — | — | X | — | X | | 64 Tail Rotor | X/— | — | X | — | — | X | — | — | — | — | — | | 64A Tail rotor -Monitoring and indicating | X/X | X | — | X | X | X | — | — | X | — | X | | 65 Tail Rotor Drive | X/— | X | — | — | — | X | — | — | — | — | — | | 65A Tail Rotor Drive — Monitoring and indicating | X/X | X | — | X | X | X | — | — | X | — | X | | 66 Folding Blades/Pylon | X/— | X | X | — | — | X | — | — | — | — | — | | 67 Rotors Flight Control | X/— | X | X | — | X | X | — | — | — | — | — | | 53 Airframe Structure ([Helicopter](https://avioverse.aero/glossary/easa/helicopter)) Note: covered under Airframe structures | | | | | | | | | | | | | 25 Emergency Flotation Equipment | X/X | X | X | X | X | X | X | X | — | — | — | | Airframe structures: | | | | | | | | | | | | | 51 Standard Practices and Structures (damage classification, assessment and repair) | | | | | | | | | | | | | 53 Fuselage | X/— | — | — | — | — | X | — | — | — | — | — | | 54 Nacelles/Pylons | X/— | — | — | — | — | — | — | — | — | — | — | | 55 Stabilisers | X/— | — | — | — | — | — | — | — | — | — | — | | 56 Windows | X/— | — | — | — | — | X | — | — | — | — | — | | 57 Wings | X/— | — | — | — | — | — | — | — | — | — | — | | 52 Doors | X/X | X | X | — | — | — | — | X | — | — | — | | Airframe systems: | | | | | | | | | | | | | 21 Air Conditioning | X/X | X | X | — | X | X | X | X | — | X | X | | 21A Air Supply | X/X | X | — | — | — | — | X | — | — | — | — | | 21B Pressurisation | X/X | X | — | — | X | X | X | — | — | X | X | | 21C Safety and warning Devices | X/X | — | X | — | — | — | — | X | — | — | — | | 22 Autoflight | X/X | — | — | — | X | — | X | X | X | X | X | | 23 Communications | X/X | — | X | — | X | — | X | X | X | X | X | | 24 Electrical Power | X/X | X | X | X | X | X | X | X | X | X | X | | 25 Equipment and Furnishings | X/X | X | X | X | — | — | X | X | X | — | — | | 25A Electronic Equipment including emergency equipment | X/X | X | X | X | — | — | X | X | X | — | — | | 26 Fire Protection | X/X | X | X | X | X | X | X | X | X | X | X | | 27 Flight Controls | X/X | X | X | X | X | X | X | — | — | — | — | | 27A Sys. Operation: Electrical/Fly-by-Wire | X/X | X | X | X | X | — | X | — | X | — | X | | 28 Fuel Systems | X/X | X | X | X | X | X | X | X | — | X | — | | 28A Fuel Systems — Monitoring and indicating | X/X | X | — | — | — | — | X | — | X | — | X | | 29 Hydraulic Power | X/X | X | X | X | X | X | X | X | — | X | — | | 29A Hydraulic Power — Monitoring and indicating | X/X | X | — | X | X | X | X | — | X | X | X | | 30 Ice and Rain Protection | X/X | X | X | — | X | X | X | X | — | X | X | | 31 Indicating/Recording Systems | X/X | X | X | X | X | X | X | X | X | X | X | | 31A Instrument Systems | X/X | X | X | X | X | X | X | X | X | X | X | | 32 Landing Gear | X/X | X | X | X | X | X | X | X | X | X | — | | 32A Landing Gear — Monitoring and indicating | X/X | X | — | X | X | X | X | — | X | X | X | | 33 Lights | X/X | X | X | — | X | — | X | X | X | X | — | | 34 Navigation | X/X | — | X | — | X | — | X | X | X | X | X | | 35 Oxygen | X/— | X | X | X | — | — | X | X | — | — | — | | 36 Pneumatic | X/— | X | — | X | X | X | X | — | X | X | X | | 36A Pneumatic — Monitoring and indicating | X/X | X | X | X | X | X | X | X | X | X | X | | 37 Vacuum | X/— | X | — | X | X | X | — | — | — | — | — | | 38 Water/Waste | X/— | X | X | — | — | — | X | X | — | — | — | | 41 Water Ballast | X/— | — | — | — | — | — | — | — | — | — | — | | 42 Integrated modular avionics | X/X | — | — | — | — | — | X | X | X | X | X | | 44 Cabin Systems | X/X | — | — | — | — | — | X | X | X | X | X | | 45 On-Board Maintenance System (or covered in 31) | X/X | X | X | X | X | X | X | X | X | X | X | | 46 Information Systems | X/X | — | — | — | — | — | X | — | X | X | X | | 47 Nitrogen generation system | X/X | X | X | X | X | X | X | — | — | — | X | | 50 Cargo and Accessory Compartments | X/X | — | X | — | — | — | — | — | — | — | — | | 55/57 Flight control surfaces | X/— | — | — | — | — | X | — | — | — | — | — | | Turbine/Piston Engine Module: | | | | | | | | | | | | | 70 Standard Practices — Engines — only type particular | — | — | X | — | — | — | — | X | — | — | — | | 70A Constructional arrangement and operation (Installation Inlet, Compressors, Combustion Section, Turbine Section, Bearings and Seals, Lubrication Systems) | X/X | — | — | — | — | — | — | — | — | — | — | | Turbine engines: | | | | | | | | | | | | | 70B Engine Performance | — | — | — | — | — | X | — | — | — | — | — | | 71 Power Plant | X/— | X | X | — | — | — | — | X | — | — | — | | 72 Engine Turbine/Turbo Prop/Ducted Fan/ Unducted fan | X/— | — | — | — | — | — | — | — | — | — | — | | 73 Engine Fuel and Control | X/X | X | — | — | — | — | — | — | — | — | — | | 73A FADEC Systems | X/X | X | — | X | X | X | X | — | X | X | X | | 74 Ignition | X/X | X | — | — | — | — | X | — | — | — | — | | 75 Air | X/— | — | — | X | — | X | — | — | — | — | — | | 76 Engine Controls | X/— | X | — | — | — | X | — | — | — | — | — | | 77 Engine Indicating | X/X | X | — | — | X | X | X | — | — | X | X | | 78 Exhaust | X/— | X | — | — | X | — | — | — | — | — | — | | 79 Oil | X/— | — | X | X | — | — | — | — | — | — | — | | 80 Starting | X/— | X | — | — | X | X | — | — | — | — | — | | 82 Water Injection | X/— | X | — | — | — | — | — | — | — | — | — | | 83 Accessory Gearboxes | X/— | — | X | — | — | — | — | — | — | — | — | | 84 Propulsion Augmentation | X/— | X | — | — | — | — | — | — | — | — | — | | Auxiliary Power Units (APUs): | | | | | | | | | | | | | 49 Auxiliary Power Units (APUs) | X/— | X | X | — | — | X | — | — | — | — | — | | Piston Engines: | | | | | | | | | | | | | 70 Standard Practices — Engines — only type particular | — | — | X | — | — | — | — | X | — | — | — | | 70A Constructional arrangement and operation (Installation Inlet, Compressors, Combustion Section, Turbine Section, Bearings and Seals, Lubrication Systems) | X/X | — | — | — | — | — | — | — | — | — | — | | 70B Engine Performance | — | — | — | — | — | X | — | — | — | — | — | | 71 Power Plant | X/— | X | X | — | — | — | — | X | — | — | — | | 73 Engine Fuel and Control | X/X | X | — | — | — | — | — | — | — | — | — | | 73A FADEC Systems | X/X | X | — | X | X | X | X | X | X | X | X | | 74 Ignition | X/X | X | — | — | — | — | X | — | — | — | — | | 76 Engine Controls | X/— | X | — | — | — | X | — | — | — | — | — | | 77 Engine Indicating | X/X | X | — | — | X | X | X | — | — | X | X | | 78 Exhaust | X/— | X | — | — | X | X | — | — | — | — | — | | 79 Oil | X/— | — | X | X | — | — | — | — | — | — | — | | 80 Starting | X/— | X | — | — | X | X | — | — | — | — | — | | 81 Turbines | X/— | X | X | X | — | X | — | — | — | — | — | | 82 Water Injection | X/— | X | — | — | — | — | — | — | — | — | — | | 83 Accessory Gearboxes | X/— | — | X | X | — | — | — | — | — | — | — | | 84 Propulsion Augmentation | X/— | X | — | — | — | — | — | — | — | — | — | | Electric power plant | | | | | | | | | | | | | Electric engines | X/X | X | X | X | X | X | X | — | — | X | — | | Fuel cell and related systems | X/X | X | X | X | X | X | X | — | — | X | — | | Batteries | X/X | X | X | X | X | X | X | — | — | X | — | | Auxiliary systems to the electric power plant | X/X | X | X | X | X | X | X | — | X | X | X | | Propellers: | | | | | | | | | | | | | 60A Standard Practices — Propeller | — | — | — | X | — | — | — | — | — | — | — | | 61 Propellers/ Propulsion | X/X | X | X | — | X | X | — | — | — | — | — | | 61A Propeller Construction | X/X | — | X | — | — | — | — | — | — | — | — | | 61B Propeller Pitch Control | X/— | X | — | X | X | X | — | — | — | — | — | | 61C Propeller Synchronising | X/— | X | — | — | — | X | — | — | — | X | — | | 61D Propeller Electronic control | X/X | X | X | X | X | X | X | X | X | X | X | | 61E Propeller Ice Protection | X/— | X | — | X | X | X | — | — | — | — | — | | 61F Propeller Maintenance | X/X | X | X | X | X | X | X | X | X | X | X | | Special chapters for aeroplanes with a power plant other than piston/turbine/electric and other than piston/turbine helicopters | For the relevant aircraft type, definition of special chapters of the theoretical element of the aircraft type training is available in the OSD of the aircraft, established in accordance with Regulation (EU) No 748/2012. | | | | | | | | | | | | Special chapters for [non-conventional aircraft](https://avioverse.aero/glossary/easa/non-conventional-aircraft) | For the relevant aircraft type, definition of special chapters of the theoretical element of the aircraft type training is available in the OSD of the aircraft, established in accordance with Regulation (EU) No 748/2012. | | | | | | | | | | | IR · 3.2 — Regulation (EU) No 1321/2014 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025 [All rules in APPENDICES TO ANNEX III (Part-66)](https://avioverse.aero/regulations/easa/continuing-airworthiness/part-66/appendices-to-annex-iii-part-66) Consolidated from the EASA Easy Access Rules (revision 2 Sep 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.