Part-66L Information
UK continuing airworthiness regulation requires BGA inspectors to hold a UK Part-66 licence with the correct category to certify a release to service for Part-21 sailplanes, powered sailplanes, TMGs and aeroplanes. A UK Part 66 licence is valid for 5 years from the date of issue.
This information is published to support BGA inspectors and those planning to become BGA inspectors. Feedback is welcome and in particular with reference to study resources.
The regulation
Learning objectives and study resources
1L Basic knowledge
1L – study resources:
Aviation Maintenance Technician Handbook – General (FAA-h-8083)
- Chapter 1, Safety
- Chapter 3, Mathematics
- Chapter 5, Physics for aviation
- Chapter 12, Fundamentals of Electricity and Electronics
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair
- Chapter 1, Section 2, Health and Safety
2L – Human factors
2L – study resources:
- CAP718 (Human factors in maintenance)
- Aviation Maintenance Technician Handbook – General (FAA-h-8083)
3L – Aviation legislation
3L – Aviation legislation learning objectives
3L – study resources:
- Continuing Airworthiness Regulations (CAA)
- CS-22
- CS-STAN
- CAP747 (Mandatory requirements for airworthiness)
4L – Airframe wooden, metal tube and fabric
4L – study resources:
Aviation Maintenance Technician Handbook—Airframe (Volume 1):
- Chapter 3, Aircraft Fabric Covering
- Chapter 6, Aircraft Wood and Structural Repair
- Chapter 8, Aircraft Painting and Finishing
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair
- Chapter 1 Wood Structure
- Chapter 2 Fabric covering
- Chapter 4 Metal structure, welding and brazing
- Chapter 6 Corrosion Inspection and protection
- Chapter 7 Aircraft hardware, control cables and turnbuckles
Standard repairs to gliders (BGA)
5L – Airframe composite
5L – study resources:
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair. Chapter 3. Fibreglass and plastics.
- Repairs
- Canopy repairs
Aviation Maintenance Technician Handbook (FAA-H-8031 31) —Volume 1 and Volume 2 Chapter 7. Composites.
Standard repairs to gliders (BGA)
Plastic plane patch primer (Ursula Hanle)
6L – Airframe metal
6L – study resources:
Aviation Maintenance Technician Handbook – General (FAA-h-8083)
Chapter 7 Aircraft Materials, Hardware, and Processes
Chapter 8 Cleaning and Corrosion Control.
Chapter 10 Inspection Concepts and Techniques
Chapter 11 Hand Tools and Measuring Devices
Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31 Volumes 1 en 2):
- Chapter 4, Aircraft Metal Structural Repair
- Chapter 5, Aircraft Welding
- Chapter 13, Aircraft Landing gear systems
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair.
- Chapter 3 Section 2 Metallic sandwich secondary structure repairs
- Chapter 4 Metal structure, welding and brazing
- Chapter 5 Non-destructive inspection
- Chapter 6 Corrosion Inspection and protection
- Chapter 7 Aircraft hardware, control cables and turnbuckles
- Chapter 9 Aircraft systems and components
Standard repairs to gliders (BGA)
7L – Airframe general
7L – study resources:
Aviation Maintenance Technician Handbook—General:
- Chapter 6, Weight & Balance
- Chapter 7, Materials
- Chapter 9, Fluid lines
- Chapter 10, Inspection concepts and techniques
- Chapter 12, Fundamentals of Electricity & Electronics, 12-81, 12-89-94
Aviation Maintenance Technician Handbook (FAA-H-8031 31)
- Chapter 1, Aircraft structures
- Chapter 7, Composites, 7-15 Non destructive inspection
- Chapter 10, Aircraft Instruments
- Chapter 11, Communication and Navigation
- Chapter 12, Hydraulic and pneumatic systems
- Chapter 13 Landing gear
- Chapter 14 Aircraft Fuel Systems
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair.
- Chapter 5, Non Destructive testing
- Chapter 7, Aircraft hardware
- Chapter 8, Engines, Fuel, Exhaust, propellers, Section 1, 8-8 & 9, Section 2, 4, 5, 6
- Chapter 9 Aircraft Systems and components; section 1 Landing gear, section 2 Hydraulics, section 3 Emergency equipment, section 4 Cabin interior
- Chapter 10 Weight & Balance
- Chapter 11 Aircraft Electrical Systems
- Chapter 12 Aircraft avionics
Standard repairs to gliders (BGA)
8L – Powerplant
8L – study resources:
Aviation Maintenance Technician Handbook— Power Plant Volume 1 and Volume 2.
- Chapter 9, propellers
- Chapter 10, Aircraft Instruments and systems, page 3-11
- Chapter 14 Aircraft Fuel Systems
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair.
- Chapter 8, Engines, Fuel, Exhaust, propellers, Section 1, 2, 3, 4, 5, 6
12L – Radio, Com, ELT, transponder, instruments
12L – study resources
AC43-13-1B (FAA) Acceptable methods, techniques and practices – aircraft inspection and repair.
- Chapter 11 Aircraft Electrical Systems
Aviation Maintenance Technician Handbook—Airframe
- Volume 1 Chapter 9 Aircraft Electrical System
Aviation Maintenance Technician Handbook—Airframe
- Volume 2 Chapter 11 Aircraft Electrical System
Transponders and radios:
Other resources
AC65-9a (FAA) A&P Mechanic General Handbook
AC65-12a (FAA) A&P Mechanic Powerplant Handbook
AC65-15a (FAA) A&P Mechanic Airframe Handbook
BGA airworthiness and maintenance webpages
CAA Part-66 information webpage
Theoretical knowledge testing
CAA published Part66L e-exams and module information
Please note that the CAA are responsible for the content of their exams. The Part66L examinations are only available online. The first step is for the candidate to register for the CAA customer portal. Once registered, the candidate can then engage with e-examination process. This candidate user guide explains in detail.
The training organisation is BGA and the reference number is GBR.DTO.0007.
Booked examinations are managed by BGA invigilators* who have been specifically approved by the CAA. Candidates are encouraged to contact the BGA office in good time so that an invigilator can be allocated for an online examination. Candidates are advised to only book exams once they feel fully prepared.
Further guidance is available from the BGA Chief Technical Officer.
*Current invigilators are Kate Byrne (SGC, Scotland & Borders), Pete Stratten (BGA office), Paul Whitehead (North East), Colin Watt (South East)
Application process
Part-66L licence CAA application process