Yes, Part-M is applicable to Part-145 organisations. Article 3(2) of Regulation (EU) 1321/2014 states that organisations and personnel involved in maintenance of aircraft and components shall comply with Part-M. Nevertheless, not all the requirements of Part-M are relevant to Part-145 organisations.
In addition to the Part-M provisions directly referred to in Part-145 (such as reference to M.A.304 in 145.A.48 or to EASA Form 1 in Appendix I to Part-145), the following Part-M requirements shall also be considered by Part 145 organisations:
- M.A.201(c) – Responsibilities
- M.A.403(b) – Aircraft defects