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Appendix VII — Basic knowledge requirements for category L aircraft maintenance licence
Regulation (EU) 2023/989
The definitions of the different levels of knowledge required in this Appendix are the same as those set out in point 1 of Appendix I.
1.Modularisation
The modules required for each aircraft licence subcategory/category shall be in accordance with the following matrix. Where applicable, the subject modules are indicated by an ‘X’, while ‘n/a’ means that the subject module is not applicable nor required.
The basic knowledge requirement for L5 shall be the same as for any B1 subcategory (as indicated in Appendix I) plus other modules as shown in the matrix.
Licence subcategories | |||||||||
Composite sailplanes | Sailplanes | Composite powered sailplanes and composite ELA1 aeroplanes | Powered sailplanes and ELA1 aeroplanes | Hot-air balloons | Gas balloons | Hot-air airships | ELA2 gas airships | Gas airships above ELA2 | |
Subject modules | L1C | L1 | L2C | L2 | L3H | L3G | L4H | L4G | L5 |
1L ‘Basic knowledge’ | X | X | X | X | X | X | X | X | n/a |
2L ‘Human factors’ | X | X | X | X | X | X | X | X | n/a |
3L ‘Aviation legislation’ | X | X | X | X | X | X | X | X | n/a |
4L ‘Wooden and/or metal-tube structure covered with fabric’ | n/a | X | n/a | X | n/a | n/a | n/a | n/a | n/a |
5L ‘Composite structure’ | X | X | X | X | n/a | n/a | n/a | n/a | n/a |
6L ‘Metallic structure’ | n/a | X | n/a | X | n/a | n/a | n/a | n/a | n/a |
7L ‘Airframe – general, mechanical and electrical systems’ | X | X | X | X | n/a | n/a | n/a | n/a | n/a |
8L ‘Power plant’ | n/a | n/a | X | X | n/a | n/a | X | X | X (38) |
9L ‘Balloons – hot-air balloons’ | n/a | n/a | n/a | n/a | X | n/a | X | n/a | n/a |
10L ‘Balloons – gas (free/tethered) balloons’ | n/a | n/a | n/a | n/a | n/a | X | n/a | X | X |
11L ‘Airships – hot-air/gas AIRSHIPS’ | n/a | n/a | n/a | n/a | n/a | n/a | X | X | X |
12L ‘Radio Com/ELT/Transponder/ Instruments’ | X | X | X | X | n/a | n/a | X | X | X |
MODULE 1L – BASIC KNOWLEDGE
MODULE 1L – BASIC KNOWLEDGE | Level |
1L.1Mathematics —Arithmetic —Algebra —Geometry | 1 |
1L.2Physics —Matter —Mechanics —Temperature | 1 |
1L.3Electrics — AC and DC circuits | 1 |
1L.4Aerodynamics/aerostatics | 1 |
1L.5Workplace safety and environmental protection | 2 |
MODULE 2L – HUMAN FACTORS
MODULE 2L – HUMAN FACTORS | Level |
2L.1General | 1 |
2L.2Human performance and limitations | 1 |
2L.3Social psychology | 1 |
2L.4Factors that affect performance | 1 |
2L.5Physical environment | 1 |
2L.6The ‘Dirty Dozen’ and risk mitigation | 2 |
MODULE 3L – AVIATION LEGISLATION
MODULE 3L – AVIATION LEGISLATION | Level |
3L.1Regulatory framework | 1 |
3L.2Continuing airworthiness regulations | 1 |
3L.3Repairs and modifications (Part-ML) | 2 |
3L.4Maintenance data (Part-ML) | 2 |
3L.5Licence privileges and how to exercise them properly (Part-66, Part-ML) | 2 |
MODULE 4L – WOODEN AND/OR METAL-TUBE STRUCTURE COVERED WITH FABRIC
MODULE 4L – WOODEN AND/OR METAL-TUBE STRUCTURE COVERED WITH FABRIC | Level |
4L.1Airframe wooden/combination of metal tube and fabric | 2 |
4L.2Materials | 2 |
4L.3Identifying damages and defects | 3 |
4L.4Standard repair and maintenance procedures | 3 |
MODULE 5L – COMPOSITE STRUCTURE
MODULE 5L – COMPOSITE STRUCTURE | Level |
5L.1Airframe fibre-reinforced plastic (FRP) | 2 |
5L.2Materials | 2 |
5L.3Identifying damages and defects | 3 |
5L.4Standard repair and maintenance procedures | 3 |
MODULE 6L – METALLIC STRUCTURE
MODULE 6L – METALLIC STRUCTURE | Level |
6L.1Metallic airframe | 2 |
6L.2Materials | 2 |
6L.3Identifying damages and defects | 3 |
6L.4Standard repair and maintenance procedures | 3 |
MODULE 7L – AIRFRAME – GENERAL, MECHANICAL AND ELECTRICAL SYSTEMS
MODULE 7L – AIRFRAME – GENERAL, MECHANICAL AND ELECTRICAL SYSTEMS | Level |
7L.1Theory of flight – gliders and aeroplanes | 1 |
7L.2Airframe structure – gliders and aeroplanes | 1 |
7L.3Air conditioning (ATA 21) | 1 |
7L.4Electrical power, cables and connectors (ATA 24) | 2 |
7L.5Equipment and furnishing (ATA 25) | 2 |
7L.6Fire protection and other safety systems (ATA 26) | 2 |
7L.7Flight controls (ATA 27) | 3 |
7L.8Fuel system (ATA 28) | 2 |
7L.9Hydraulic power (ATA 29) | 2 |
7L.10Ice and rain protection (ATA 30) | 1 |
7L.11Landing gear (ATA 32) | 2 |
7L.12Lights (ATA 33) | 2 |
7L.13Oxygen (ATA 35) | 2 |
7L.14Pneumatic/vacuum (ATA 36) | 2 |
7L.15Water ballast (ATA 41) | 2 |
7L.16Fasteners | 2 |
7L.17Pipes, hoses and connectors | 2 |
7L.18Springs | 2 |
7L.19Bearings | 2 |
7L.20Transmissions | 2 |
7L.21Control cables | 2 |
7L.22Fits and clearances | 2 |
7L.23Aircraft weight and balance | 2 |
7L.24Workshop practices and tools | 2 |
7L.25Disassembly, inspection, repair and assembly techniques | 2 |
7L.26Abnormal events | 2 |
7L.27Maintenance procedures | 2 |
MODULE 8L – POWER PLANT
MODULE 8L – POWER PLANT | Piston | Turbine | Electrical | Level |
8L.1General engine fundamentals | X | X | X | 2 |
8L.2Piston engine fundamentals and performance | X | 2 | ||
8L.3Piston engine construction | X | 2 | ||
8L.4Piston engine fuel system (non-electronic) | X | 2 | ||
8L.5Starting and ignition system | X | 2 | ||
8L.6Air intake, exhaust and cooling system | X | 2 | ||
8L.7Supercharging/turbocharging | X | 2 | ||
8L.8Lubrication systems of piston engines | X | 2 | ||
8L.9Engine indication systems | X | X | X | 2 |
8L.10Electric aircraft engines | X | 2 | ||
8L.11Turbine engine fundamentals and performance | X | 2 | ||
8L.12Inlet and compressor | X | 2 | ||
8L.13Combustion chamber, starting and ignition system | X | 2 | ||
8L.14Turbine section and exhaust | X | 2 | ||
8L.15Other turbine engine components and systems | X | 2 | ||
8L.16Turbine engine inspections and ground operation | X | 2 | ||
8L.17Propeller | X | X | X | 2 |
8L.18Full authority digital engine control (FADEC) | X | X | X | 2 |
8L.19Lubricants and fuels | X | X | X | 2 |
8L.20Engine and propeller installation | X | X | X | 2 |
8L.21Engine monitoring and ground operation | X | X | X | 2 |
8L.22Engine/propeller storage and preservation | X | X | X | 2 |
MODULE 9L – BALLOONS – HOT-AIR BALLOONS
MODULE 9L – BALLOONS – HOT-AIR BALLOONS | Level |
9L.1 Theory of flight – hot-air balloons | 1 |
9L.2General airframe of hot-air balloons | 2 |
9L.3Envelope | 3 |
9L.4Heater system/burner | 3 |
9L.5Basket and basket suspension (including alternative devices) | 3 |
9L.6Instruments | 2 |
9L.7Equipment | 2 |
9L.8Hot-air balloon handling and storage | 2 |
9L.9Disassembly, inspection, repair and assembly techniques | 3 |
MODULES 10L – BALLOONS – GAS (FREE/TETHERED) BALLOONS
MODULES 10L – BALLOONS – GAS (FREE/TETHERED) BALLOONS | Level |
10L.1Theory of flight – gas balloons | 1 |
10L.2General airframe of gas balloons | 2 |
10L.3Envelope | 3 |
10L.4Netting | 3 |
10L.5Valves, parachutes and other related systems | 3 |
10L.6Load ring | 3 |
10L.7Basket (including alternative devices) | 3 |
10L.8Ropes and lines | 3 |
10L.9Instruments | 2 |
10L.10Tethered gas balloon (TGB) systems | 3 |
10L.11Equipment | 2 |
10L.12Gas balloon handling and storage | 2 |
10L.13Disassembly, inspection, repair and assembly techniques | 3 |
MODULES 11L – AIRSHIPS – HOT-AIR/GAS AIRSHIPS
MODULES 11L – AIRSHIPS – HOT-AIR/GAS AIRSHIPS | Level |
11L.1Theory of flight and control of airships | 2 |
11L.2Airship airframe structure – general concepts | 2 |
11L.3Airship envelope | 2 |
11L.4Gondola | 3 |
11L.5Airship flight control (ATA 27/55) | 3 |
11L.6Electrical power (ATA 24) | 3 |
11L.7Lights (ATA 33) | 2 |
11L.8Ice and rain protection | 3 |
11L.9Fuel systems (ATA 28) | 2 |
11L.10Engine and propellers in airships | 2 |
11L.11Airship handling and storage | 2 |
11L.12Disassembly, inspection, repair and assembly techniques | 2 |
MODULE 12L – RADIO COM/ELT/TRANSPONDER/INSTRUMENTS
MODULE 12L – RADIO COM/ELT/TRANSPONDER/INSTRUMENTS | Level |
12L.1Radio Com/ELT | 2 |
12L.2Transponder and FLARM | 2 |
12L.3Instruments | 2 |
12L.4Avionics general test equipment | 1 |