This section establishes the requirements for the issue of an aircraft maintenance engineer licence and conditions of its validity and use, for aeroplanes and helicopters of the following categories:
(1) Category A: refers to an aircraft’s regular maintenance
(2) Category B1: refers to an aircraft (including its structure, mechanical and electrical system) and powerplant maintenance
(3) Category B2: refers to an aircraft’s electrical and avionic systems maintenance
(4) Category B3: refers to piston-engine non-pressurized aircraft of 2,000 kg Maximum Takeoff Mass (MTOM) and below.
(5) Category C: refers to the completion of all other maintenance, except for line maintenance, and the issuance of certificates of return to service.
Categories A and B1 are subdivided into subcategories relative to combinations of aeroplanes, helicopters, turbine and piston engines. The subcategories are:
(1) A1 and B1.1 Aeroplanes Turbine
(2) A2 and B1.2 Aeroplanes Piston
(3) A3 and B1.3 Helicopters Turbine
(4) A4 and B1.4 Helicopters Piston
Holders of category B1, B2 and C aircraft maintenance licence shall only exercise certification privileges on a specific aircraft type when the aircraft maintenance engineer licence is endorsed with the appropriate aircraft type rating.

Applicants for aircraft maintenance engineer licence shall be of at least 18 years of age. The theoretical exam subjects thereto shall be as described in Attachment 1; practical exam subjects shall be implemented in accordance with the " CAA MECHANIC RATING REPORT FORM ".

• Attachment 1 Requirements of aircraft maintenance engineer licence knowledge examination.odt

Applicants for aircraft maintenance engineer licence shall provide relevant documents proving that he/she has satisfied the below qualifications for the review and approval of the CAA to issue the license.
(1) For category A and B3 and subcategories B1.2 or B1.4:
a) More than 3 years of practical maintenance experience on operating aircraft of the applied category or subcategory. Practical maintenance experience requirement may be reduced by 6 months for applicants who hold a “Level C technician for repairing airplane”; or
b) More than 2 years of practical maintenance experience on operating aircraft of the applied category or subcategory, for applicants who have completed relevant training as provided by the operator or repair station; or
c) More than 1 year of practical maintenance experience on operating aircraft of the applied category or subcategory, for applicants who have completed a basic training course at a CAA approved airmen maintenance training organization.
(2) For category B2 and subcategories B1.1 or B1.3:
a) More than 5 years of practical maintenance experience on operating aircraft of the applied category or subcategory. Practical maintenance experience on operating aircraft may be reduced by 6 months for applicants who hold a “Level C technician for repairing airplane”; or
b) More than 4 years of practical maintenance experience on operating aircraft of the applied category or subcategory, for applicants who have completed relevant training as established by the operator or repair station; or
c) More than 2 years of practical maintenance experience on operating aircraft of the applied category or subcategory, for applicants who have completed a basic training course at a CAA approved airmen maintenance training organization.
(3) For category C with respect to large aircrafts, the qualifications below shall be met and relevant documents shall be issued by the repair station or operator to the CAA:
a) Holder of category B2 or subcategory B1.1, B1.3 license and more than 3 years of practical maintenance experience on large aircrafts; or
b) Holder of subcategory B1.2 or B1.4 license and more than 5 years of practical maintenance experience on large aircrafts.
(4) For category C with respect to non-large aircraft, applicants must hold category B1 or B2 license and more than 3 years of practical maintenance experience on non-large aircrafts. Such documents shall be issued by the repair station or operator and submitted to the CAA.
The practical experience required by the preceding subparagraph shall include aircraft related maintenance work and must be obtained within 10 years from the date of application. For all first-time applicants, at least one year of the required work experience must be recent maintenance work experience within 7 years on aircraft of the category/subcategory for which the first-time aircraft maintenance engineer licence is sought. For category/subcategory additions to an existing aircraft maintenance engineer licence maintenance experience shall be those as prescribed in Attachment 2, “Work experience requirements for extending Aircraft Maintenance Engineer Licence”.
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 CAA. Additional experience of civil aircraft maintenance shall, however, be required to ensure understanding of the civil aircraft maintenance environment.

• Attachment 2 Work experience requirements for extending Aircraft Maintenance Engineer Licence”.odt

The holder of an aircraft maintenance engineer licence may exercise certification privileges pursuant to the category/subcategory, as prescribed as follows:
(1) Category A: Holder shall be permitted to signoff the maintenance task following scheduled line maintenance and simple defect rectification within the limits of tasks specifically endorsed on the authorization by the repair station or operator.
(2) Category B1: Holder shall be permitted to issue certificates of return to service or signoff the maintenance task following maintenance of aircraft structure, powerplant, mechanical and electrical systems and replacement of avionic line replaceable units which only require simple tests to prove their serviceability. Category B1 shall automatically include the appropriate A subcategory.
(3) Category B2: Holder shall be permitted to signoff the maintenance task following maintenance of avionics, electrical systems and engine, mechanical system related avionics and electronical systems which only require simple tests to prove their serviceability.
(4) Category B3: Holder shall be permitted to issue certificate of return to service or signoff the maintenance task following maintenance of aircraft structure, engine, mechanical and electrical systems and avionics systems which only require simple tests to prove their serviceability.
(5) Category C: Holder shall be permitted to issue certificates of return to service on entire aircraft after maintenance but exclude line maintenance.
(6) Holders of category B1 or B2 license may perform tasks prescribed by Article 103-1
Holders of aircraft maintenance engineer license must meet the following qualifications when issuing certificates or signoff maintenance task established by the preceding subparagraph:
(1) To have obtained the priviledge to issue certificates of return to service or signoff maintenance task.
(2) To be able to read, write and communicate to the related technical documents and procedures necessary to support the issue of the certificates at an understandable level.
(3) Except adding a new aircraft type, to have continuously maintained 6 months of practical maintenance experience of the type rating and aircraft type as granted by the aircraft maintenance license within preceding 2 years period.
(4) To have performed within the limits of tasks specifically endorsed on the authorization by the repair station or operator and as established by the license together with relevant annotations on aircraft type.
(5) For aircraft maintenance tasks in accordance with subparagraph (6) above, shall be in accordance with Article 103-2

The holder of a category A aircraft maintenance engineer license may only exercise certification privileges in accordance with the privileges granted by the repair station or operator if he/she has satisfactory completed the relevant category A aircraft task training carried out by a repair station or operator and obtained relevant authorization documents.

Holders of category B1, B2 and C aircraft maintenance engineer license shall complete the relevant category B1, B2 or C aircraft type training from a CAA approved airmen maintenance training organization, CAA accepted aircraft manufacturer, or an aircraft type training course approved by the CAA and obtain relevant certification documents which shall annotate the respective aircraft type. The basis for aircraft type training shall be implemented in accordance with Attachment 3.
Category B1, B2 and C approved type training shall include theoretical and practical elements. Applicants for the annotation of first aircraft type on the license after July 01, 2020 shall complete on the job training.

• Attachment 3 Aircraft Type Training Course Standards.odt

Holders of categories B1, B2, B3 and C aircraft maintenance engineer license may apply the appropriate aircraft type group ratings, unless the CAA has determined that the complexity of the aircraft requires an individual type rating.
Applicants of group ratings pursuant to the above paragraph shall have practical maintenance experience required to the applied type group aircrafts.

An applicant apply for an aircraft maintenance engineer license, additional rating, removal technical limitation or endorsement of aircraft type shall have a training or work experience logbook for recording and proving the applicant’s maintenance training and experience.