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Regulation

Regulatory Article (RA) 4000 series: continuing airworthiness engineering regulations (CAE)

This is the combined series for the 4000 continuing airworthiness engineering RAs.

Updates to this page

From:
Ministry of Defence and Military Aviation Authority
Published:
27 November 2014
Last updated:
4 June 2026
Show all updates

  1. The combined 4000 Series has been updated to reflect changes to RA 4061 - Air Systems Displaying Abnormal Flying Characteristics - Issue 5 - See NAA 26/38.

  2. The combined 4000 Series has been updated to reflect changes to RA 4800 - General Requirements (MRP Part 145) - Issue 12, RA 4806 - Personnel Requirements (MRP 145.A.30) - Issue 10, RA 4821 - Findings and Observations (MRP 145.A.95) - Issue 5, RA 4947 - Continuing Airworthiness Management - MRP Part M Subpart G - Issue 6, RA 4951 - Quality Management System - MRP Part M Subpart G - Issue 6, RA 4955 - Findings - MRP Part M Subpart G - Issue 5 and RA 4966 - Military Continuing Airworthiness Management Organization Instructions - MRP Part M Subpart C - Issue 4 - See NAA 26/34 and NAA 26/35.

  3. The combined 4000 Series has been updated to reflect changes to RA 4803 – Method of Application for Approval (MRP 145.A.15) - Approved Maintenance Organizations only - Issue 7, RA 4804 - Terms of Approval (MRP 145.A.20) - Approved Maintenance Organizations only - Issue 6, RA 4805 – Facility Requirements (MRP 145.A.25) - Issue 6, RA 4943 - Continuing Airworthiness Management Exposition - MRP Part M Subpart G - Issue 6 and RA 4945 - Personnel Requirements - MRP Part M Subpart G - Issue 8. See NAA 25/48 and NAA 25/49.

  4. The combined 4000 Series has been updated to reflect changes to RA 4806 - Personnel Requirements (MRP 145.A.30) - Issue 9. See NAA 24/29. RA 4945 - Personnel Requirements, MRP Part M Subpart G - Issue 7. See NAA 24/27.

  5. The combined 4000 Series has been updated to reflect changes to RA 4800 – General Requirements (MRP Part 145) - Issue 11, RA 4801 – Certifying Staff - Issue 7, RA 4806 - Personnel Requirements (MRP 145.A.30) - Issue 8, RA 4807 - Certifying Staff1 and Support Staff (MRP 145.A.35) - Issue 7, RA 4808 - Equipment, Tools and Material (MRP 145.A.40) - Issue 7, RA 4809 - Acceptance of Components (MRP 145.A.42) - Issue 9, RA 4810 - Technical Information (MRP 145.A.45) - Issue 7, RA 4811 - Maintenance Planning (MRP 145.A.47) - Issue 5, RA 4812 - Certification of Air System Release and Component Release (MRP 145.A.50) - Issue 9, RA 4813 - Maintenance Records (MRP 145.A.55) - Issue 9, RA 4815 - Maintenance Procedures and Safety and Quality Policy (MRP 145.A.65) - Issue 9 RA 4816 - Maintenance Organization Exposition (MRP 145.A.70) - Approved Maintenance Organizations only - Issue 10, RA 4941 - Application - MRP Part M Subpart G - Issue 4, RA 4943 - Continuing Airworthiness Management Exposition - MRP Part M Subpart G - Issue 5, RA 4945 - Personnel Requirements - MRP Part M Subpart G - Issue 6, RA 4947 - Continuing Airworthiness Management - MRP Part M Subpart G - Issue 5, RA 4948 - Documentation - MRP Part M Subpart G - Issue 4, RA 4951 - Quality System - MRP Part M Subpart G - Issue 5, RA 4954 - Continued Validity of Approval - MRP Part M Sub Part G - Issue 5, RA 4955 - Findings - MRP Part M Subpart G - Issue 4, RA 4956 - Military Continuing Airworthiness Management Organization Tasks Performed by Other Organizations - MRP Part M Subpart G - Issue 5, RA 4961 - Aircraft Maintenance Programme and Military Continuing Airworthiness Management Organization Responsibilities for Air System Release - MRP Part M Subpart C - Issue 3, RA 4962 - Special Instructions (Technical) - MRP Part M Subpart C - Issue 3, RA 4963 - Modifications and Repairs - MRP Part M Subpart C - Issue 3, RA 4964 - Continuing Airworthiness Management Records - MRP Part M Subpart C - Issue 2, RA 4965 – Local Manufacture Assurance – MRP Part M Subpart C - Issue 2, RA 4966 – Military Continuing Airworthiness Management Organization Instructions – MRP Part M Subpart C - Issue 3, RA 4970 – Baseline Military Airworthiness Review - MRP Part M Subpart I - Issue 5, RA 4971 - Military Airworthiness Review and Certification - MRP Part M Subpart I - Issue 5, RA 4972 - Military Airworthiness Review Surveyors - MRP Part M Subpart I - Issue 4, RA 4973 - Military Airworthiness Review Process - MRP Part M Subpart I - Issue 4 and RA 4974 - Circumstances when Military Airworthiness Review Certificates Become Invalid - MRP Part M Subpart I - Issue 4 - See NAA 23/58 and NAA 23/59.

  6. The combined 4000 Series has been updated to reflect changes to RA 4009 - Aviation Engineering Orders and Local Procedures - Issue 3, RA 4051 - Airborne Checks - Issue 3, RA 4053 – Royal Flights and Flights for Nominated Very Important Persons - Issue 4, RA 4054 – Ground Handling Operations - Issue 3, RA 4061 - Air Systems Displaying Abnormal Flying Characteristics - Issue 4, RA 4103 - Removal of Body Fluid Contamination from Aircraft - Issue 3, RA 4213 - Control of Air System Components used in Ground Test Facilities - Issue 3, RA 4253 – Loose Article Recovery - Issue 3, RA 4510 - Ground Running of Aero-Engines and Auxiliary Power Units - Issue 3, RA 4600 – Aircraft Assisted Escape Systems – Safety and Maintenance - Issue 3, RA 4657 – Weapon Loading and Armed Aircraft Maintenance Issue 3. See NAA 23/25.

  7. The combined 4000 Series has been updated to reflect changes to RA 4809 - Acceptance of Components (MRP 145.A.42) - Issue 8 - see NAA 22/36, RA 4802 - Scope of the MRP Part 145 (MRP 145.A.10) - Approved Maintenance Organizations only - Issue 6, RA 4812 - Certification of Air System Release and Component Release (MRP 145.A.50) - Issue 8, RA 4815 - Maintenance Procedures and Safety and Quality Policy (MRP 145.A.65) - Issue 8, RA 4816 - Maintenance Organization Exposition (MRP 145.A.70) - Approved Maintenance Organizations only - Issue 9, and RA 4817 - Privileges of the Organization (MRP 145.A.75) - Issue 5 - see NAA 22/35.

  8. The combined 4000 series has been updated to reflect changes to RA 4801 – Certifying Staff - Issue 6 - See NAA 22/10, RA 4807 - Certifying Staff and Support Staff (MRP 145.A.35) - Issue 6 and RA 4813 - Maintenance Records (MRP 145.A.55) - Issue 8 - See NAA 22/11.

  9. The combined 4000 series has been updated to reflect the changes to RA 4800, RA 4803, RA 4806, RA 4807, RA 4809, RA 4810, RA 4812, RA 4813, RA 4814, RA 4815, RA 4816, RA 4817 and RA 4820 - See NAA 21/60, NAA 21/61 and NAA 21/62.

  10. The combined 4000 series has been updated to reflect the changes to RA 4945 - Personnel Requirements - MRP Part M Sub Part G - Issue 5 - See NAA 21/33 and RA 4966 - Military Continuing Airworthiness Management Organization Instructions – MRP Part M Sub Part C - Issue 2 - See NAA 21/34.

  11. The combined 4000 series has been updated to reflect the withdrawal of RA 4050 - Continuing airworthiness of remotely piloted air systems - Issue 5. See NAA 20/50.

  12. The combined 4000 Series has been updated to reflect the changes to RA 4801 - Issue 5, RA 4802 - Issue 5, RA 4805 - Issue 5, RA 4812 - Issue 6 - See NAA 20/37; RA 4804 - Issue 4, RA 4808 - Issue 6, RA 4813 - Issue 6, RA 4816 - Issue 7, RA 4821 - Issue 4 - See NAA 20/38.

  13. The combined 4000 series has been updated to reflect the changes to RA 4009 - Aviation Engineering Orders and Procedures - Issue 2, RA 4051 - Airborne Checks - Issue 2, RA 4053 - Royal Flights and Flights for Nominated Very Important Persons - Issue 3, RA 4054 - Ground Handling Operations - Issue 2, RA 4061 - Air Systems Displaying Abnormal Flying Characteristics - Issue 3, RA 4103 - Removal of Body Fluid Contamination from Aircraft - Issue 2, RA 4213 - Control of Air System Components used in Ground Test Facilities - Issue 2, RA 4253 - Loose Articles – Recovery Procedures - Issue 2, RA 4510 - Ground Running of Aero-Engines and Auxiliary Power Units - Issue 2, RA 4600 - Aircraft Assisted Escape Systems – Safety and Maintenance Procedures - Issue 2, RA 4657 - Weapon Loading and Armed Aircraft Maintenance - Issue 2, RA 4809 - Acceptance of Components (MRP 145.A.42) - Issue 6, RA 4815 - Maintenance Procedures and Safety and Quality Policy (MRP 145.A.65) - Issue 6 - See NAA 19/37, RA 4941 - Application – MRP Part M Sub Part G - Issue 3, RA 4943 - Continuing Airworthiness Management Exposition – MRP Part M Sub Part G - Issue 4, RA 4945 - Personnel Requirements - MRP Part M Sub Part G - Issue 4, RA 4947 - Continuing Airworthiness Management - MRP Part M Sub Part G - Issue 4, RA 4948 - Documentaion - MRP Part M Sub Part G - Issue 3, RA 4951 - Quality System - MRP Part M Sub Part G - Issue 4, RA 4954 - Contined Validity of Approval - MRP Part M Sub Part - Issue 4, RA 4955 - Findings - MRP Part M Sub Part - Issue 3, RA 4956 - Military Continuing Airworthiness Management Organization Task permormed by other organizations - MRP Part M Sub Part G - Issue 4, RA 4961 - Aircraft Maintenance Programme and CAMO Responsibilities for Air System Release - MRP Part M Sub Part C - Issue 2, RA 4962 - Special Instructions (Technical) - MRP Part M Sub Part C - Issue 2, RA 4963 - Modifications and Repairs - MRP Part M Sub Part - Issue 2, RA 4965 - Local Manufacture Assurance - MRP Part M Sub Part C - Initial Issue, RA 4966 - Military Continuing Airworthiness Management Organization Instructions – MRP Part M Sub Part C - Initial Issue, RA 4970 - Baseline Military Airworthiness Review – MRP Part M Sub Part I - Issue 4, RA 4971 - Military Airworthiness Review and Certification – MRP Part M Sub Part I R - Issue 4, RA 4972 - Military Airworthiness Review Surveyors – MRP Part M Sub Part I - Issue 3, RA 4973 - Military Airworthiness Review Process – MRP Part M Sub Part I - Issue 3, RA 4974 - Circumstances when Military Airworthiness Review Certificates become invalid – MRP Part M Sub Part I - Issue 3 - See NAA 19/38.

  14. The combined 4000 series has been updated to reflect the changes to RA 4214 – Support Policy Statements, RA 4457 - Special Instructions (Technical), RA 4800 – General Requirements (MRP Part 145), RA 4801 – Certifying Staff, RA 4802 - Scope of the MRP Part 145 (MRP 145.A.10) - Approved Maintenance Organizations only, RA 4803 – Method of Application for Approval (MRP 145.A.15) - Approved Maintenance Organizations only, RA 4804 - Terms of Approval (MRP 145.A.20) - Approved Maintenance Organizations only, RA 4805 – Facility Requirements (MRP 145.A.25), RA 4806 - Personnel Requirements (MRP 145.A.30), RA 4807 - Certifying Staff and Support Staff (MRP 145.A.35), RA 4808 - Equipment, Tools and Material (MRP 145.A.40), RA 4809 - Acceptance of Components (MRP 145.A.42), RA 4810 - Technical Information (MRP 145.A.45), RA 4811 - Maintenance Planning (MRP 145.A.47), RA 4812 - Certification of Air System Release and Component Release (MRP 145.A.50), RA 4813 - Maintenance Records (MRP 145.A.55), RA 4814 - Occurrence Reporting (MRP 145.A.60), RA 4815 - Maintenance Procedures and Safety and Quality Policy (MRP 145.A.65), RA 4943 - Continuing Airworthiness Management Exposition - MRP Part M Sub Part G, RA 4945 - Personnel Requirements - MRP Part M Sub Part G, RA 4947 - Continuing Airworthiness Management - MRP Part M Sub Part G, RA 4951 - Quality System - MRP Part M Sub Part G, RA 4953 - Record Keeping - MRP Part M Sub Part G, RA 4956 - Military Continuing Airworthiness Management Organization Tasks Performed by Other Organizations - MRP Part M Sub Part G, RA 4961 - Aircraft Maintenance Programme - MRP Part M Sub Part C, RA 4962 - Special Instructions (Technical) - MRP Part M Sub Part C , RA 4963 - Modifications and Repairs - MRP Part M Sub Part C, RA 4964 - Continuing Airworthiness Management Records - MRP Part M Sub Part C, RA 4970 – Baseline Military Airworthiness Review - MRP Part M Sub Part I, RA 4971 - Military Airworthiness Review and Certification - MRP Part M Sub Part I - See NAA 18/37, NAA 18/38 and NAA 18/39.

  15. The combined 4000 series has been updated to reflect the change to RA 4053 – Royal Flights and Flights for Nominated Very Important Persons Issue 2 – See NAA 18/12.

  16. The combined 4000 series has been updated to reflect the change to the 4000 Series Foreword – See NAA 16/26.

  17. The combined 4000 series has been updated to reflect the changes to RA 4057 - Flight Servicing Issue 2, RA 4063 - Replenishment of Liquid and Gaseous Oxygen Systems in Exceptional Circumstances Issue 3, RA 4101 - Aircraft Cabin Pressure Testing – Safety Health Environmental and Fire Precautions Issue 3, RA 4102 - Biological Security Issue 2, RA 4104 - Control of Compressed Gas and Pneumatic Lubricating Equipment Issue 2, RA 4156 - Elementary Self-Supervision Issue 3, RA 4161 - Contractors’ Working Parties Maintaining Aircraft at Stations, Ships and Units Issue 2, RA 4200 - Maintenance Philosophy - General Issue 2, RA 4265 - Laser Equipment Maintenance Issue 2, RA 4504 - Non-Destructive Testing Issue 2, RA 4509 - Aircraft Domestic Water Issue 2, RA 4557 - Electrostatic Discharge Sensitive Devices – Prevention of Damage by Static Electricity Issue 2, RA 4558 - Aircraft TEMPEST Testing Issue 2, RA 4559 - Aircraft COMSEC Material and RA 4653 - Examination of in-use Pyrotechnics and Dangerous Goods issued for use in Survival Equipment and on Airborne Platforms Issue 2 – See NAA 16/25.

  18. The combined 4000 series has been updated to reflect the change to RA 4800 General Requirements (MRP Part 145) - Issue 8, RA 4809 Acceptance of Components (MRP 145.A.42) - Issue 4, RA 4812 Certification of Aircraft and Component Release (MRP 145.A.50) - Issue 4, RA 4813 Maintenance Records (MRP 145.A.55) - Issue 4, RA 4815 Maintenance Procedures and Safety and Quality Policy (MRP 145.A.65) - Issue 4 and RA 4816 Maintenance Organization Exposition (MOE) (MRP 145.A.70) - Approved Maintenance Organizations (AMOs) only - Issue 6 – See NAA 16/18.

  19. The combined 4000 series has been updated to reflect the change to RA 4061 - Aircraft Abnormal Flying Characteristics Issue 2, RA 4212 - Ground Instructional Aircraft and Aero-Engines, and the Control of Components used in Simulators or as Ground Training Aids Issue 3, RA 4214 - Support Policy Statements Issue 2, RA 4403 - Expedient Repair Issue 2, RA 4808 - Equipment, Tools and Material (MRP 145.A.40) Issue 4 and RA 4810 - Technical Information (MRP 145.A.45) Issue 4 – See NAA 16/15.

  20. The combined 4000 series has been updated to reflect the change to RA 4050 – continuing airworthiness of remotely piloted air systems (RPAS) Issue 4 – See NAA 16/05.

  21. The combined 4000 series has been updated to reflect the change to RA 4941: application, MRP Part M Sub Part G issue 2, RA 4943: continuing airworthiness management exposition (CAME), MRP Part M Sub Part G issue 2, RA 4945: personnel requirements, MRP Part M Sub Part G issue 2, RA 4947: continuing airworthiness management, MRP Part M Sub Part G issue 2, RA 4948: documentation, MRP Part M Sub Part G issue 2, RA 4951: quality system, MRP Part M Sub Part G issue 2, RA 4953: record keeping, MRP Part M Sub Part G issue 2, RA 4954: continued validity of approval, MRP Part M Sub Part G issue 3, RA 4955: findings, MRP Part M Sub Part G issue 2, RA 4956: military continuing airworthiness management organization (Mil CAMO) tasks performed by other organizations - MRP Part M Sub Part G issue 2, RA 4970: baseline military airworthiness review (BMAR), MRP Part M Sub Part I issue 2, RA 4971: military airworthiness review (Mil AR) and certification, MRP Part M Sub Part I issue 2, RA 4972: military airworthiness review surveyors, MRP Part M Sub Part I issue 2, RA 4973: military airworthiness review process, MRP Part M Sub Part I issue 2 and RA 4974: circumstances when military airworthiness review certificates become invalid, MRP Part M Sub Part I issue 2 – See NAA 15/36.

  22. See NAA 15/22

  23. See NAA 15/13

  24. Updated the CAE 4000 series combined document to Issue 9.

  25. CAE 4000 series combined document has been updated

  26. 4000 series: continuing airworthiness engineering regulations has been amended.

  27. First published.

Documents

4000 series CAE

PDF, 6.52 MB, 260 pages

Details

The purpose of Regulatory Articles (RA) is to provide the framework of policy, rules, directives, standards, processes and the associated direction, advice and guidance, which governs military aviation activity and against which air safety is assessed. The regulator develops regulations in response to applicable UK law, MOD needs, legal changes and recommendations resulting from both assurance or investigation functions.

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