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M.A.604 Maintenance organisation manual

Annex I (Part-M) · Regulation (EU) No 1321/2014 · EAR revision 2 Sep 2025

IRImplementing rule

M.A.604Maintenance organisation manual

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

1.a statement signed by the accountable manager appointed in accordance with point M.A.606, point (a) which confirms that the organisation will at all times carry out its activities in accordance with the requirements of this Annex (Part-M) or Annex Vb (Part-ML), as applicable, and with the manual;

2.the organisation's scope of work, and;

3.the title(s) and name(s) of person(s) referred to in point M.A.606(b), and;

4.an organisation chart showing associated chains of responsibility between the person(s) referred to in point M.A.606(b), and;

5.a list of certifying staff and, if applicable, airworthiness review staff, with their scope of approval, and;

6.a list of locations where maintenance is carried out, together with a general description of the facilities, and;

7.procedures specifying how the maintenance organisation ensures compliance with this Part, and;

8.the maintenance organisation manual amendment procedure(s).

(b)The maintenance organisation manual and its amendments shall be approved by the competent authority.

(c)Notwithstanding point (b) minor amendments to the manual may be approved through a procedure (hereinafter called indirect approval).

IR · M.A.604 — Regulation (EU) No 1321/2014 · Regulation (EU) 2020/270 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

AMCAcceptable means of compliance

AMC M.A.604Maintenance organisation manual

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1.Appendix IV to this AMC provides an outline of the format of an acceptable maintenance organisation manual for a small organisation with less than 10 maintenance staff.

2.The maintenance organisation exposition as specified in Part-145 provides an outline of the format of an acceptable maintenance organisation manual for larger organisations with more than 10 maintenance staff, dependent upon the complexity of the organisation.

AMC · AMC M.A.604 — Regulation (EU) No 1321/2014 · ED Decision 2015/029/R · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

All rules in SECTION A — TECHNICAL REQUIREMENTS

Consolidated from the EASA Easy Access Rules (revision 2 Sep 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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