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Aircraft Maintenance Licensing in Europe — EASA Part-66

EASA Part-66 AML overview.

Sources checked as of August 2026. Regulations may change.
Last content review: 11 August 2026View official sources ↓
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EASA PART-66 CAREER MAP

View the EASA Part-66 career path

Explore the relationship between licence category, basic knowledge, maintenance experience, type ratings and organisation authorization.

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1

Choose the licence category

Part-66 includes categories/subcategories such as A, B1, B2, B2L, B3, L and C, with privileges depending on category.

2

Meet the basic knowledge requirement

Applicants must demonstrate the applicable Part-66 basic knowledge requirements, normally through approved examinations/modules.

3

Build qualifying maintenance experience

Required practical experience depends on the category and the applicant’s technical training background.

4

Apply to a competent national authority

EASA itself does not issue licences. Initial applications are made to the competent authority of an EASA Member State/participating state.

5

Add aircraft type ratings where required

For many complex aircraft privileges, the relevant aircraft type rating and associated training/experience are added to the AML.

Key points

Licence

Aircraft Maintenance Licence (AML)

Common certifying categories

B1 / B2 / C

Issuer

National competent authority, not EASA itself

Understand B1 / B2 and authorization layers correctly

B1 / B2

B1 categories are generally associated with mechanical systems, structure, powerplant and related electrical scope, while B2 is associated with avionics and electrical systems. Check current Part-66, relevant AMC/GM and the competent authority for exact privileges, subcategories and requirements.

An AML is not the same as company authorization

Holding a Part-66 Aircraft Maintenance Licence (AML) does not automatically provide certification authorization for a specific aircraft or task within a particular Part-145 organisation. Type qualification/endorsement, organisation procedures, competence assessment, recent experience and the employer authorization process may also apply.

For CVs and applications, keep “Part-66 licence”, “type rating/type training” and “company authorization” clearly separated.

Official sources