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Appendix IV Experience and basic knowledge modules or partial modules required for extending an aircraft maintenance licence under Annex III (Part-66)

Annex III (Part-66) · Regulation (EU) No 1321/2014 · EAR revision 2 Sep 2025

AppendixAppendix

Appendix IVExperience and basic knowledge modules or partial modules required for extending an aircraft maintenance licence under Annex III (Part-66)

A. Experience requirements Table A below shows the experience requirements, in months, for adding a new category or subcategory to a licence granted in accordance with Annex III (Part-66). The experience requirements can be reduced by 50 % if the applicant has completed an approved Part-147 basic training course relevant to a particular subcategory. Table A

To: From:A1A2A3A4B1.1B1.2B1.3B1.4B2B2LB3L1L2L3L4L5
A1—6662462412241261212121224
A26—662462412241261212121224
A366—624122462412121212121224
A4666—24122462412121212121224
B1.1—666—6661212666121212
B1.26—6624—2462412———121212
B1.366—666—61212666121212
B1.4666—24624—2412666121212
B2666612121212——1266121224
B2L66661212121212—1266121224
B36—6624624122412———121212
L12424242436243624362424—6 *12 *12 *24 *
L22412242436123624362412——12 *12 *24 *
L3303030304830483048303012 *12 *—6 *24 *
L4303030304830483048303012 *12 *——24 *
L5242424243624362436242412 *12 *12 *——

B. Basic knowledge modules or partial modules required The purpose of this table is to outline the examinations required to add a new basic category/subcategory to an AML granted in accordance with this Annex. The syllabi prepared in accordance with Appendix I and Appendix VII require different levels of knowledge for different licence categories within a module; therefore, there are additional examinations applicable to certain modules for licence holders wishing to extend an AML granted in accordance with this Annex to include another category/subcategory and an analysis of the module shall be conducted to determine the subjects missing or passed at a lower level. Table B

To FromA1A2A3A4B1.1B1.2B1.3B1.4B2B2LB3L1CL1L2CL2L3HL3GL4HL4GL5
A1None16.12.12, 16.All except 9.All except 9.All except 9.All except 9.All except 9.All except 9.All except 2, 8, 9.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 9.
A211, 15.None12, 15.12.All except 9.All except 9.All except 9.All except 9.All except 9.All except 9.All except 2, 8, 9.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 9.
A311, 17.11, 16, 17.None16.All except 9.All except 9.All except 9.All except 9.All except 9.All except 9.All except 2, 8, 9.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 9.
A411, 15, 17.11, 17.15.NoneAll except 9.All except 9.All except 9.All except 9.All except 9.All except 9.All except 2, 8, 9.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 2L.All except 9.
B1.1None16.12.12, 16.None16.12.12, 16.4, 5, 13,144, 5, 13SQ, 14SQ16.12L.12L.8L**, 12L.8L**, 12L.9L.10L.9L, 11L.10L, 11L.8L**, 10L,11, 12L.
B1.211,15.None12, 15.12.11, 15.None12, 15.12.4, 5, 13, 144, 5, 13SQ. 14SQNone12L.12L.8L*, 12L.8L*, 12L.9L.10L.9L, 11L.10L, 11L.8L*, 10L,11,12L.
B1.311, 17.11, 16, 17.None16.11, 17.11, 16, 17.None16.4, 5, 13, 144, 5, 13SQ. 14SQ11, 16, 17.7L,12L.7L,12L.7L, 8L**, 12L.7L, 8L**, 12L.9L.10L.9L, 11L.10L, 11L.8L**, 10L,11, 12L.
B1.411, 15, 17.11, 17.15.None11, 15, 17.11, 17.15.None4, 5, 13, 144, 5, 13SQ. 14SQ11, 17.7L,12L.7L,12L.7L,8L*, 12L.7L,8L*, 12L.9L.10L.9L,11L.10L, 11L.8L*, 10L, 11, 12L.
B26, 7, 11, 15, 17.6, 7, 11, 16, 17.6, 7, 12, 15.6, 7, 12, 16.6, 7, 11, 15, 17.6, 7, 11, 16, 17.6, 7, 12, 15.6, 7, 12, 16.NoneNone6, 7, 11, 16, 17.5L, 7L.4L, 5L, 6L,7L.5L,7L, 8L.4L,5L, 6L,7L, 8L.9L.10L.9L, 11L.10L, 11L.6, 7, 11 or 12, 15 or 16, 17, 8L, 10L
B2L6, 7, 11, 15, 17.6, 7, 11, 16, 17.6, 7, 12, 15.6, 7, 12, 16.6, 7, 11, 15, 17.6, 7, 11, 16, 17.6, 7, 12, 15.6, 7, 12, 16.13SQ, 14SQ.None6, 7, 11, 16, 17.5L, 7L, 12LSQ.4L, 5L, 6L, 7L, 12LSQ.5L, 7L, 8L, 12LSQ.4L, 5L, 6L, 7L, 8L, 12LSQ.9L.10L.9L, 11L.10L, 11L.6, 7, 11 or 12, 15 or 16, 17, 8L, 10L
B311, 15.1112, 15.12.2,3,5, 8, 11, 15.2,3,5,8, 11.2,3,5,8, 12, 15.2,3,5,8, 12.2,3,4, 5, 8, 13, 14.2,3,4, 5, 8, 13SQ.None12L.12L.8L*, 12L.8L*, 12L.9L.10L.9L, 11L.10L, 11L.2,3,5,8, 11 or 12, 8L*, 10L, 11L, 12L.
To FromA1A2A3A4B1.1B1.2B1.3B1.4B2B2LB3L1CL1L2CL2L3HL3GL4HL4G
L1CAllAllAllAllAllAllAllAllAllAllAllNone4L, 6L.8L.4L, 6L, 8L.9L.10L.8L,9L, 11L.8L, 10L, 11L.
L1AllAllAllAllAllAllAllAllAllAllAllNoneNone8L.8L.9L.10L.8L,9L, 11L.8L,10L, 11L.
L2CAllAllAllAllAllAllAllAllAllAllAllNone4L,6L.None4L, 6L.9L.10L.9L,11L.10L, 11L.
L2AllAllAllAllAllAllAllAllAllAllAllNoneNoneNoneNone9L.10L.9L,11L.10L, 11L.
L3HAllAllAllAllAllAllAllAllAllAllAll5L,7L.4L,5L, 6L,7L.5L,7L, 8L.4L,5L, 6L,7L, 8L.None10L.8L,11L.8L,10L, 11L.
L3GAllAllAllAllAllAllAllAllAllAllAll5L,7L.4L,5L, 6L,7L.5L,7L, 8L.4L,5L, 6L,7L, 8L.9L.None8L,9L, 11L.8L,11L.
L4HAllAllAllAllAllAllAllAllAllAllAll5L,7L.4L,5L, 6L,7L.5L,7L.4L,5L, 6L,7L.None10L.None10L.
L4GAllAllAllAllAllAllAllAllAllAllAll5L,7L.4L,5L, 6L,7L.5L,7L.4L,5L, 6L,7L.9L.None9L.None

SQ = it depends on system qualification *: excluding the subjects related to piston engines **: excluding the subjects related to turbine engines;

APPENDIX · Appendix IV — Regulation (EU) No 1321/2014 · Regulation (EU) 2023/989 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

All rules in APPENDICES TO ANNEX III (Part-66)

Consolidated from the EASA Easy Access Rules (revision 2 Sep 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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