The Maintenance Manager (*) is one of the nominated persons required by the EASA to be approved through a Form 4.
According to the rules, he/she will represent the maintenance management structure of the MRO and will be responsible for those applicable functions specified in the EASA Part 145 regulation. The main requirements to be nominated as Maintenance Manager are (according to requirement 145.A.30(b)/3):

  1. Demonstrate relevant knowledge, background and satisfactory experience related to aircraft or component maintenance and,
  2. Demonstrate a Working Knowledge of the EASA Part 145.

However, while a working knowledge can be easily understood as that one putting the person in condition to take decisions based on the EASA Part 145 regulation, not much clarifications are given for what concerns the relevant knowledge, the background and the experience.

That is why the EASA has detailed how to demonstrate what required in its Working Instruction WI.CAO.00115 (**), which is valid for those MRO holding an EASA approval and located outside the EU.

Here is a summary (of WI.CAO.00115), which describes the relevant requirements to be a Maintenance Manager: 

  • knowledge of maintenance standards, which can be demonstrated by experience and/or appropriate training,
  • comprehensive knowledge of the MOE (MRO Manual), which can be demonstrated through an appropriate training and/or through the interview with the EASA PMI (principal maintenance inspector),
  • comprehensive knowledge of EASA Part 145, which can be demonstrated through an aviation legislation training and/or through the interview with the EASA PMI (principal maintenance inspector),
  • Fuel Tank Safety Training (Phase 1 only is enough),
  • Human Factor Initial Training (as per GM 145.A.30(e) or Part 66),
  • Knowledge on EWIS, which cane be demonstrated by a training (group level to be agreed with the EASA, but should not be the same required for those who physically work on electrical wirings),
  • Knowledge of a relevant sample of aircraft type(s) (or component as applicable), which can be demonstrated by training course like an a/c familiarization training or element of the aircraft type/component training that focus on typical systems. Alternatively an assessment might be performed by the EASA (I would not recommend it as instead of familiarization you might face queries at a level of a higher type training for B1/B2),
  • ability to write, read and communicate to an understandable level in the English language …and if applicable, in the language in which the maintenance data (i.e. AMM) are written,
  • practical experience and expertise in the application of aviation safety standards and safe maintenance practice, which is assessed by the EASA inspector case by case,
  • five years relevant work experience of which at least two years should be from the aeronautical industry in appropriate position

According to the EASA WI, an interview might be in any case required by the EASA PMI in order to ensure (through sample checks) that the requirements of the above bullet points are met by the applicant manager.

If you cover all the above written 10 bullet points, you are ready to go …good luck!


(*) The EASA regulation foresees the possibility to have a Base Maintenance Manager (BMM), a Line Maintenance Manager (LMM) and a Workshop Maintenance Manager (WMM). The BMM is responsible for ensuring that all maintenance required to be carried out in the hangar, plus any defect rectification carried out during base maintenance, is carried out to the required standard, similarly for LMM in line maintenance and WMM in component maintenance shops.

(**): The EASA Working Instructions, the User Guides, letters and further relevant MROs information is published here: EASA Foreign MROs