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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