--- title: "ML.A.502 Component maintenance — Part-ML · Avioverse" description: "Components which are accepted by the owner in accordance with point (b)(2) of point 21.A.307 of Annex I (Part 21) or with point (b)(2) of point 21L.A.193…" url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-ml/section-a-technical-requirements/ml-a-502" --- # ML.A.502 Component maintenance Annex Vb (Part-ML) · Regulation (EU) No 1321/2014 · EAR revision 2 Sep 2025 IR Implementing rule ## ML.A.502 Component maintenance (a) Components which are accepted by the owner in accordance with point (b)(2) of point 21.A.307 of Annex I (Part 21) or with point (b)(2) of point 21L.A.193 of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012 shall be maintained by any person or [organisation](https://avioverse.aero/glossary/easa/organisation), subject to reacceptance by the owner under the conditions of point (b)(2) of point 21.A.307 of Annex I (Part 21) or of point (b)(2) of point 21L.A.193 of Annex Ib (Part 21 Light). This [maintenance](https://avioverse.aero/glossary/easa/maintenance) is not eligible for the issuance of an EASA Form 1, as set out in Appendix II to Annex I (Part-M), and shall be subject to the [aircraft](https://avioverse.aero/glossary/easa/aircraft) release requirements. (b) Components shall be released in accordance with the following table: | | Released using an EASA Form 1 (as set out in Appendix II of Annex I (Part-M)) | Released at aircraft level per point ML.A.801 (not possible to issue an EASA Form 1) | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | | Components maintained in accordance with [component](https://avioverse.aero/glossary/easa/component) maintenance data (data issued by the component manufacturer) | | | | Maintenance other than overhaul | Engine-rated (for engine) or component-rated (for other components) maintenance organisations | (i) Aircraft-rated maintenance organisations; and/or (ii) independent [certifying staff](https://avioverse.aero/glossary/easa/certifying-staff) | | Overhaul of components other than engines and propellers | Component-rated maintenance organisations | Not possible | | Overhaul of engines and propellers for CS-VLA, CS-22 and [LSA aircraft](https://avioverse.aero/glossary/easa/lsa-aircraft) | Engine-rated (for engine) or component-rated (for propeller) maintenance organisations | (iii) Aircraft-rated maintenance organisations; and/or (iv) independent certifying staff | | Overhaul of engines and propellers for other than CS-VLA, CS-22 and LSA aircraft | Engine-rated (for engine) or component-rated (for propeller) maintenance organisations | Not possible | | Components maintained in accordance with aircraft maintenance data (data issued by the aircraft manufacturer) | | | | All components and all types of maintenance | Engine-rated (for engine) or component-rated (for other components) maintenance organisations | Aircraft-rated maintenance organisations; and/or independent certifying staff | (c) Components which are referred to in points (b)(3) to (b)(6) of point 21.A.307 of Annex I (Part 21) or in points (b)(3) to (b)(6) of point 21L.A.193 of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012 may be maintained by any person or organisation. In such case, by way of derogation from point (b), the maintenance of those components shall be released with a “declaration of maintenance accomplished” issued by the person or organisation that performed the maintenance. The “declaration of maintenance accomplished” shall contain at least basic details of the maintenance carried out, the date on which the maintenance was completed, and the identification of the organisation or person that issues it. It shall be considered a maintenance record and equivalent to an EASA Form 1 in respect of the maintained component. IR · ML.A.502 — Regulation (EU) No 1321/2014 · Regulation (EU) 2022/1360 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025 GM Guidance material ## GM1 ML.A.502 Component maintenance [COMPONENT](https://avioverse.aero/glossary/easa/component) [MAINTENANCE](https://avioverse.aero/glossary/easa/maintenance) BY INDEPENDENT [CERTIFYING STAFF](https://avioverse.aero/glossary/easa/certifying-staff) The cases where the independent certifying staff can release component maintenance are only valid when the independent certifying staff is allowed, according to ML.A.201, to carry out maintenance (refer to GM1 ML.A.201) and when he or she is competent for such component maintenance. As an example, in accordance with ML.A.201(e), the independent certifying staff cannot carry out maintenance when the balloon is operated under Subpart-ADD. GM · GM1 ML.A.502 — Regulation (EU) No 1321/2014 · ED Decision 2020/002/R · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025 GM Guidance material ## GM1 ML.A.502(c) Component maintenance A ‘declaration of [maintenance](https://avioverse.aero/glossary/easa/maintenance) accomplished’ is a certificate prepared in any shape/form by the person or [organisation](https://avioverse.aero/glossary/easa/organisation) that performed any maintenance on the [component](https://avioverse.aero/glossary/easa/component) covered by the certificate and subject to conditions in ML.A.502(c). This person or organisation does not need an approval to perform maintenance in accordance with Regulation (EU) No 1321/2014. In order for the component to be eligible for installation with a ‘declaration of maintenance accomplished’, this declaration, together with other records, should allow the determination that the component was first installed as ‘new’, as a component referred to in ML.A.502(c). Such a component should not be installed in an [aircraft](https://avioverse.aero/glossary/easa/aircraft) if there is information on the certificate which is not readable or not understandable or states that the component is not in a satisfactory condition for operation. GM · GM1 ML.A.502(c) — Regulation (EU) No 1321/2014 · ED Decision 2021/009/R · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025 [All rules in SECTION A — TECHNICAL REQUIREMENTS](https://avioverse.aero/regulations/easa/continuing-airworthiness/part-ml/section-a-technical-requirements) 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.