(Part-66) 66.1
For the purpose of this Part, the competent authority shall be the authority designated by the Member State to whom a
person applies for the issuance of an aircraft maintenance licence.
SECTION A
SUBPART A
AIRCRAFT MAINTENANCE LICENCE AEROPLANES AND HELICOPTERS
66.A.1 Scope
(a) This section establishes the requirements for the issue of an aircraft maintenance licence and conditions of its validity
and use, for aeroplanes and helicopters of the following categories:
— Category A
— Category B1
— Category B2
— Category C
(b) Categories A and B1 are subdivided into subcategories relative to combinations of aeroplanes, helicopters, turbine
and piston engines. The subcategories are:
— A1 and B1.1 Aeroplanes Turbine
— A2 and B1.2 Aeroplanes Piston
— A3 and B1.3 Helicopters Turbine
— A4 and B1.4 Helicopters Piston
66.A.10 Application
An application for an aircraft maintenance licence or amendment to such licence shall be made on EASA Form 19 and
in a manner established by the competent authority and submitted thereto. An application for the amendment to an
aircraft maintenance licence shall be made to the competent authority that issued the aircraft maintenance licence.
66.A.15 Eligibility
An applicant for an aircraft maintenance licence shall be at least 18 years of age.
66.A.20 Privileges
(a) Subject to compliance with paragraph (b), the following privileges shall apply:
1. A category A aircraft maintenance licence permits the holder to issue certificates of release to service following
minor scheduled line maintenance and simple defect rectification within the limits of tasks specifically endorsed
on the authorisation. The certification privileges shall be restricted to work that the licence holder has personally
performed in a Part-145 organisation.
2. A category B1 aircraft maintenance licence shall permit the holder to issue certificates of release to service
following maintenance, including aircraft structure, powerplant and mechanical and electrical systems. Replacement
of avionic line replaceable units, requiring simple tests to prove their serviceability, shall also be included in
the privileges. Category B1 shall automatically include the appropriate A subcategory.
3. A category B2 aircraft maintenance licence shall permit the holder to issue certificates of release to service
following maintenance on avionic and electrical systems.
4. A category C aircraft maintenance licence shall permit the holder to issue certificates of release to service
following base maintenance on aircraft. The privileges apply to the aircraft in its entirety in a Part-145 organisation.
(b) The holder of an aircraft maintenance licence may not exercise certification privileges unless:
1. in compliance with the applicable requirements of Part-M and/or Part-145.
2. in the preceding two-year period he/she has, either had six months of maintenance experience in accordance with
the privileges granted by the aircraft maintenance licence or, met the provision for the issue of the appropriate
privileges.
3. he/she is able to read, write and communicate to an understandable level in the language(s) in which the technical
documentation and procedures necessary to support the issue of the certificate of release to service are written.
66.A.25 Basic knowledge requirements
(a) An applicant for an aircraft maintenance licence or the addition of a category or subcategory to such an aircraft
maintenance licence shall demonstrate, by examination, a level of knowledge in the appropriate subject modules in
accordance with Appendix I to this Part.
The basic knowledge examinations shall be conducted by a training organisation appropriately approved under Part-
147 or by the competent authority.
(b) Full or partial credit against the basic knowledge requirements and associated examination shall be given for any
other technical qualification considered by the competent authority to be equivalent to the knowledge standard of
this Part. Such credits shall be established in accordance with Section B, Subpart E of this Part.
66.A.30 Experience requirements
(a) An applicant for an aircraft maintenance licence shall have acquired:
1. for category A and subcategories B1.2 and B1.4:
(i) three years of practical maintenance experience on operating aircraft, if the applicant has no previous relevant
technical training; or
(ii) two years of practical maintenance experience on operating aircraft and completion of training considered
relevant by the competent authority as a skilled worker, in a technical trade; or
(iii) one year of practical maintenance experience on operating aircraft and completion of a Part-147 approved
basic training course.
2. for category B2 and subcategories B1.1 and B1.3:
(i) five years of practical maintenance experience on operating aircraft if the applicant has no previous relevant
technical training; or
(ii) three years of practical maintenance experience on operating aircraft and completion of training considered
relevant by the competent authority as a skilled worker, in a technical trade; or
(iii) two years of practical maintenance experience on operating aircraft and completion of a Part -147 approved
basic training course.
3. for category C with respect to large aircraft:
(i) three years of experience exercising category B1.1, B1.3 or B2 privileges on large aircraft or as Part-145 B1.1,
B1.3 or B2 support staff, or, a combination of both; or
(ii) five years of experience exercising category B1.2 or B1.4 privileges on large aircraft or as Part-145 B1.2 or
B1.4 support staff, or a combination of both; or
4. for category C with respect to non large aircraft:
three years of experience exercising category B1 or B.2 privileges on non large aircraft or as Part-145 B1 or B.2
support staff, or a combination of both; or
5. for category C obtained through the academic route:
an applicant holding an academic degree in a technical discipline, from a university or other higher educational
institution recognised by the competent authority, three years of experience working in a civil aircraft maintenance
environment on a representative selection of tasks directly associated with aircraft maintenance including
six months of observation of base maintenance tasks.
(b) An applicant for an extension to an aircraft maintenance licence shall have a minimum civil aircraft maintenance
experience requirement appropriate to the additional category or subcategory of licence applied for as defined in
Appendix IV to this Part.
(c) For category A, B1 and B2 the experience must be practical which means being involved with a representative cross
section of maintenance tasks on aircraft.
(d) For all applicants, at least one year of the required experience must be recent maintenance experience on aircraft of
the category/subcategory for which the initial aircraft maintenance licence is sought. For subsequent category/subcategory
additions to an existing aircraft maintenance licence, the additional recent maintenance experience required
may be less than one year, but must be at least three months. The required experience must be dependent upon the
difference between the licence category/subcategory held and applied for. Such additional experience must be typical
of the new licence category/subcategory sought.
(e) Notwithstanding paragraph (a), aircraft maintenance experience gained outside a civil aircraft maintenance environment
shall be accepted when such maintenance is equivalent to that required by this Part as established by the
competent authority. Additional experience of civil aircraft maintenance shall, however, be required to ensure understanding
of the civil aircraft maintenance environment.