Skip to content

A gradual release of Avioverse begins in October 2026. Request early access →

AMC1 Appendix II — Basic examination standard (except for category L licence)

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

AMCAcceptable means of compliance

AMC1 Appendix II — Basic examination standard (except for category L licence)

The tables below show the acceptable number of questions for the submodules. Justified deviations from these values are also acceptable, provided the sum of the questions complies with the total number of questions for a given module.

MODULE 1 — MATHEMATICS

MODULE 1 — MATHEMATICSNr of questions
AB1 B2 B2L B3
Total number for the module:1632
1.1 Arithmetic66
1.2 Algebra:
(a) Simple algebraic expressions;54
(b) Equations.—12
1.3 Geometry:
(a) Simple geometrical constructions;—3
(b) Graphical representation;54
(c) Trigonometry.—3

MODULE 2 — PHYSICS

MODULE 2 — PHYSICSNr of questions
A B3B1 B2 B2L
Total number for the module:3252
2.1 Matter45
2.2 Mechanics
2.2.1 Statics67
2.2.2 Kinetics67
2.2.3 Dynamics:
(a) Mass, force, and energy;45
(b) Momentum and conservation of momentum.44
2.2.4 Fluid dynamics:
(a) Gravity and density;22
(b) Viscosity; compressibility on fluids; static, dynamic, and total pressure.23
2.3 Thermodynamics:
(a) Temperature;22
(b) Heat.28
2.4 Optics (light)—5
2.5 Wave motion and sound—4

MODULE 3 — ELECTRICS FUNDAMENTALS

MODULE 3 — ELECTRICAL FUNDAMENTALSNr of questions
AB1 B2 B2LB3
Total number for the module:205224
3.1 Electron theory222
3.2 Static electricity and conduction332
3.3 Electrical terminology322
3.4 Generation of electricity322
3.5 Sources of DC electricity333
3.6 DC circuits121
3.7 Resistance/resistor:
(a) Resistance;—31
(b) Resistors.—2—
3.8 Power—31
3.9 Capacitance/capacitor—41
3.10 Magnetism:
(a) Theory of magnetism;—31
(b) Magnetomotive force.—11
3.11 Inductance/inductor—41
3.12 DC motor/generator theory—31
3.13 AC theory531
3.14 Resistive (R), capacitive (C) and inductive (L) circuits—31
3.15 Transformers—31
3.16 Filters—1—
3.17 AC generators—31
3.18 AC motors—21

MODULE 4 — ELECTRONICS FUNDAMENTALS

MODULE 4 — ELECTRONICS FUNDAMENTALSNr of questions
AB1 B3B2 B2L
Total number for the module:—2040
4.1 Semiconductors
4.1.1 Diodes:
(a) Description and characteristics;—88
(b) Operation and function.——7
4.1.2 Transistors:
(a) Description and characteristics;—44
(b) Construction and operation.——7
4.1.3 Integrated circuits:
(a) Basic description and operation;—32
(b) Description and operation.——4
4.2 Printed circuit boards—23
4.3 Servomechanisms:
(a) Principles;—32
(b) Construction, operation, and use.——3

MODULE 5 — DIGITAL TECHNIQUES / ELECTRONIC INSTRUMENT SYSTEMS

MODULE 5 — DIGITAL TECHNIQUES / ELECTRONIC INSTRUMENT SYSTEMSNr of questions
AB3B1B2 B2L
Total number for the module:20204072
5.1 Electronic instrument systems4444
5.2 Numbering systems——35
5.3 Data conversion——34
5.4 Data buses——35
5.5 Logic circuits:
(a) Identification and applications;——34
(b) Interpretation of logic diagrams.———4
5.6 Basic computer structure:
(a) Computer terminology and technology;6242
(b) Computer operation.———6
5.7 Microprocessors———4
5.8 Integrated circuits———5
5.9 Multiplexing———4
5.10 Fibre optics——33
5.11 Electronic displays2224
5.12 Electrostatic sensitive devices6645
5.13 Software management control—133
5.14 Electromagnetic environment—134
5.15 Typical electronic/digital aircraft systems2456

MODULE 6 — MATERIALS AND HARDWARE

MODULE 6 — MATERIALS AND HARDWARENr of questions
AB1 B3B2 B2L
Total number for the module:528060
6.1 Aircraft materials — ferrous:
(a) Alloy steels used in aircraft;333
(b) Testing of ferrous materials;—21
(c) Repair and inspection procedures.—21
6.2 Aircraft materials — non-ferrous:
(a) Characteristics;343
(b) Testing of non-ferrous materials;—32
(c) Repair and inspection procedures.—21
6.3 Aircraft materials — composite and non-metallic
6.3.1 Composite and non-metallic other than wood and fabric:
(a) Characteristics;243
(b) Detection of defects;24—
(c) Repairs and inspection procedures.—22
6.3.2 Wooden structures34—
6.3.3 Fabric covering—4—
6.4 Corrosion:
(a) Chemical fundamentals;333
(b) Types of corrosion.453
6.5 Fasteners
6.5.1 Screw threads443
6.5.2 Bolts, studs, and screws665
6.5.3 Locking devices222
6.5.4 Aircraft rivets232
6.6 Pipes and unions:
(a) Identification;111
(b) Standard unions.222
6.7 Springs—11
6.8 Bearings243
6.9 Transmissions344
6.10 Control cables554
6.11 Electrical cables and connectors5611

MODULE 7 — MAINTENANCE PRACTICES

MODULE 7 — MAINTENANCE PRACTICESNr of questions
AB1 B3B2 B2L
Total number for the module:768060
7.1 Safety precautions — aircraft and workshop444
7.2 Workshop practices444
7.3 Tools666
7.4 (Reserved)———
7.5 Engineering drawings, diagrams, and standards666
7.6 Fits and clearances555
7.7 Electrical wiring interconnection system (EWIS)448
7.8 Riveting43—
7.9 Pipes and hoses43—
7.10 Springs11—
7.11 Bearings43—
7.12 Transmissions33—
7.13 Control cables43—
7.14 Material handling
7.14.1 Sheet metal—2—
7.14.2 Composite and non-metallic—2—
7.14.3 Additive manufacturing242
7.15 (Reserved)———
7.16 Aircraft weight and balance:
(a) Centre-of-gravity calculation;—22
(b) Aircraft weighing.—1—
7.17 Aircraft handling and storage756
7.18 Disassembly, inspection, repair, and assembly techniques:
(a) Types of defects and visual inspection techniques;222
(b) General repair methods — structural repair manual;—2—
(c) Non-destructive inspection techniques;—11
(d) Disassembly and reassembly techniques;211
(e) Troubleshooting techniques.—11
7.19 Abnormal events:
(a) Inspections following lightning strikes and HIRF penetration;212
(b) Inspections following abnormal events such as heavy landing and flight through turbulence.21—
7.20 Maintenance procedures666
7.21 Documentation and communication444

MODULE 8 — BASIC AERODYNAMICS

MODULE 8 — BASIC AERODYNAMICSNr of questions
A B3B1 B2 B2L
Total number for the module:2424
8.1 Physics of the atmosphere22
International Standard Atmosphere (ISA), application to aerodynamics.
8.2 Aerodynamics99
8.3 Theory of flight77
8.4 High-speed airflow44
8.5 Flight stability and dynamics22

MODULE 9 — HUMAN FACTORS

MODULE 9 — HUMAN FACTORSNr of questions
ALL
Total number for the module:28
9.1 General3
9.2 Human performance and limitations3
9.3 Social psychology2
9.4 Factors that affect human performance3
9.5 Physical environment2
9.6 Tasks2
9.7 Communication3
9.8 Human error4
9.9 Safety management2
9.10 The ‘Dirty Dozen’ and risk-mitigation4

MODULE 10 — AVIATION LEGISLATION

MODULE 10 — AVIATION LEGISLATIONNr of questions
AB1 B2 B2L B3
Total number for the module:3244
10.1 Regulatory framework55
10.2 Certifying staff — maintenance77
10.3 Approved maintenance organisations66
10.4 Independent certifying staff-4
10.5 Air operations44
10.6 Certification of aircraft, parts, and appliances14
10.7 Continuing airworthiness67
10.8 Oversight principles in continuing airworthiness23
10.9 Maintenance and certification beyond the current EU regulations (if not superseded by EU requirements)—3
10.10 Cybersecurity in aviation maintenance11

MODULE 11 — AEROPLANE AERODYNAMICS, STRUCTURES AND SYSTEMS

MODULE 11 — AEROPLANE AERODYNAMICS, STRUCTURES AND SYSTEMSNr of questions
A1A2B1.1B1.2B3
Total number for the module:1087214010060
11.1 Theory of flight:
(a) Aeroplane aerodynamics and flight controls;22222
(b) Aeroplane, other aerodynamic devices.22222
11.2 Airframe structures (ATA 51):
(a) General concepts; (b) Airworthiness requirements for structural strength;33432
33331
(c) Construction methods.11321
11.3 Airframe structures — aeroplanes
11.3.1 Fuselage, doors, windows (ATA 52/53/56):11222
(a) Construction principles;
(b) Airborne towing devices;11111
(c) Doors.1111-
11.3.2 Wings (ATA 57)22332
11.3.3 Stabilisers (ATA 55)11221
11.3.4 Flight control surfaces (ATA 55/57)11221
11.3.5 Nacelles/pylons (ATA 54)11221
11.4 Air conditioning and cabin pressurisation (ATA 21):
(a) Pressurisation;2231—
(b) Air supply;3—3——
(c) Air conditioning;3—3——
(d) Safety and warning devices;2122—
(e) Heating and ventilation system.—1—21
11.5 Instruments / avionics systems
11.5.1 Instrument systems (ATA 31)22443
11.5.2 Avionics systems32544
Fundamentals of system layouts and operation of:
— Autoflight (ATA 22);
— Communications (ATA 23);
— Navigation systems (ATA 34).
11.6 Electrical power (ATA 24)43554
11.7 Equipment and furnishings (ATA 25)
(a) Emergency equipment;42432
(b) Cabin and cargo layout.3333-
11.8 Fire protection (ATA 26)
(a) Fire and smoke detection system and fire-extinguishing systems;3243—
(b) Portable fire extinguisher.11111
11.9 Flight controls (ATA 27)32443
(a) Primary and secondary flight controls;
(b) Actuation and protection;3—3——
(c) System operation;3—3——
(d) Balancing and rigging.11332
11.10 Fuel systems (ATA 28/47)22332
(a) Systems layout;
(b) Fuel handling;22221
(c) Indications and warnings;11221
(d) Special systems;1—1——
(e) Balancing.2—2——
11.11 Hydraulic power (ATA 29)11332
(a) System description;
(b) System operation (1);11321
(c) System operation (2).2—2——
11.12 Ice and rain protection (ATA 30)11221
(a) Principles;
(b) De-icing;11221
(c) Anti-icing;1—2——
(d) Wipers;11221
(e) Rain-repellent systems.2—2——
11.13 Landing gear (ATA 32)33431
(a) Description;
(b) System operation;33421
(c) Air–ground sensing;1—1——
(d) Tail protection.11111
11.14 Lights (ATA 33)22332
11.15 Oxygen (ATA 35)33443
11.16 Pneumatic/vacuum (ATA 36)
(a) Systems;33332
(b) Pumps.33332
11.17 Water/waste (ATA 38)
(a) Systems;22221
(b) Corrosion.11111
11.18 Onboard maintenance systems (ATA 45)3—3——
11.19 Integrated modular avionics (IMA) (ATA 42)
(a) Overall system description and theory;1—1——
(b) Typical system layouts.1—1——
11.20 Cabin systems (ATA 44)2—2——
11.21 Information systems (ATA 46)2—2——

MODULE 12 — HELICOPTER AERODYNAMICS, STRUCTURES AND SYSTEMS

MODULE 12 — HELICOPTER AERODYNAMICS, STRUCTURES AND SYSTEMSNr of questions
A3 A4B1.3 B1.4
Total number for the module:100128
12.1 Theory of flight — rotary wing aerodynamics69
12.2 Flight control systems (ATA 67)99
12.3 Blade tracking and vibration analysis (ATA 18)69
12.4 Transmission36
12.5 Airframe structures (ATA 51)
(a) General concept;56
(b) Construction methods of the principal elements.57
12.6 Air conditioning (ATA 21)——
12.6.1 Air supply12
12.6.2 Air conditioning35
12.7 Instruments / avionics systems
12.7.1 Instrument systems (ATA 31)69
12.7.2 Avionics systems57
Fundamentals of system layouts and operation of: — Autoflight (ATA 22); — Communications (ATA 23); — Navigation systems (ATA 34).
12.8 Electrical power (ATA 24)810
12.9 Equipment and furnishings (ATA 25)
(a) Emergency equipment: Seats, harnesses, and belts; Lifting systems.23
(b) Emergency flotation systems: Cabin layout, cargo retention; Equipment layout; Cabin furnishing installation.33
12.10 Fire protection (ATA 26)34
(a) Fire and smoke detection systems and fire-extinguishing systems;
(b) Portable fire extinguishers.11
12.11 Fuel systems (ATA 28)78
12.12 Hydraulic power (ATA 29)88
12.13 Ice and rain protection (ATA 30)44
12.14 Landing gear (ATA 32)
(a) System description and operation;34
(b) Sensors.33
12.15 Lights (ATA 33)34
12.16 (Reserved)
12.17 Integrated modular avionics (IMA) (ATA 42)
(a) Overall system description and theory;11
(b) Typical system layouts.11
12.18 Onboard maintenance systems (ATA 45)23
Central maintenance computers; Data-loading system; Electronic library system.
12.19 Information systems (ATA 46)22

MODULE 13 — AIRCRAFT AERODYNAMICS, STRUCTURES AND SYSTEMS C/N: Communication and Navigation; Ins.: instruments; A/F: Autoflight; Sur.: Surveillance; A/S: Airframe and Systems

MODULE 13 — AIRCRAFT AERODYNAMICS, STRUCTURES AND SYSTEMSNr of questions
B2B2L BasicB2L C/NB2L Ins.B2L A/FB2L Sur.B2L A/S
Total number for the module:188322420282050
13.1 Theory of flight
(a) Aeroplane aerodynamics and flight controls;33—————
(b) Rotary wing aerodynamics.11—————
13.2 Structures — general concepts (ATA 51)
(a) General concepts;44—————
(b) Fundamentals of structural systems.44—————
13.3 Autoflight (ATA 22)
(a) Fundamentals of automatic flight control;16———8——
(b) Autothrottle systems and automatic landing systems.8———8——
13.4 Communication/navigation (ATA 23/34)
(a) Fundamentals of communication and navigation systems;24—24————
(b) Fundamentals of aircraft surveillance systems.3————20—
13.5 Electrical power (ATA 24)1313—————
13.6 Equipment and furnishings (ATA 25)5——————
13.7 Flight controls
(a) Primary and secondary flight controls (ATA 27);4———3——
(b) Actuation and protection;4———3——
(c) System operation;2———3——
(d) Rotorcraft flight controls (ATA 67).2———3——
13.8 Instruments (ATA 31)20——20———
13.9 Lights (ATA 33)77—————
13.10 Onboard maintenance systems (ATA 45)5––––––
13.11 Air conditioning and cabin pressurisation (ATA 21)
(a) Pressurisation;2—————2
(b) Air supply;2—————2
(c) Air conditioning;2—————2
(d) Safety and warning devices.2—————2
13.12 Fire protection (ATA 26)
(a) Fire and smoke detection system and fire-extinguishing systems;2—————2
(b) Portable fire extinguisher.1—————1
13.13 Fuel systems (ATA 28, ATA 47)
(a) System layout;2—————2
(b) Fuel handling;2—————2
(c) Indications and warnings;2—————2
(d) Special systems;2—————2
(e) Balancing.1—————1
13.14 Hydraulic power (ATA 29)
(a) System layout;1—————1
(b) System operation (1);5—————4
(c) System operation (2).5—————4
13.15 Ice and rain protection (ATA 30)
(a) Principles;1—————1
(b) De-icing;2—————2
(c) Anti-icing;1—————1
(d) Wiper systems;1—————1
(e) Rain repellent.1—————1
13.16 Landing gear (ATA 32)
(a) Description;1—————1
(b) System;3—————3
(c) Air–ground sensing.3—————3
13.17 Oxygen (ATA 35)2–—————
13.18 Pneumatic/vacuum (ATA 36)6–————6
13.19 Water/waste (ATA 38)2–————2
13.20 Integrated modular avionics (IMA) (ATA 42)
(a) Overall system description and theory;2——————
(b) Typical system layouts.1——————
13.21 Cabin systems (ATA 44)3——————
13.22 Information systems (ATA 46)3——————

MODULE 14 — PROPULSION

MODULE 14 — PROPULSIONNr of questions
B2 B2L Instruments B2L Airframe and Systems
Total number for the module:32
14.1 Engines
(a) Turbine engines;3
(b) Auxiliary power units (APUs);4
(c) Piston engines;2
(d) Electric and hybrid engines;4
(e) Engine control.3
14.2 Electric/electronic engine indication systems10
14.3 Propeller systems2
14.4 Starting and ignition systems4

MODULE 15 — GAS-TURBINE ENGINE

MODULE 15 — GAS-TURBINE ENGINENr of questions
A1 A3B1.1 B1.3
Total number for the module:6092
15.1 Fundamentals44
15.2 Engine performance—6
15.3 Inlet34
15.4 Compressors57
15.5 Combustion section33
15.6 Turbine section55
15.7 Exhaust44
15.8 Bearings and seals—3
15.9 Lubricants and fuels34
15.10 Lubrication systems34
15.11 Fuel systems45
15.12 Air systems33
15.13 Starting and ignition systems34
15.14 Engine indication systems57
15.15 Alternate turbine constructions—2
15.16 Turboprop engines35
15.17 Turboshaft engines23
15.18 Auxiliary power units (APUs)23
15.19 Power plant installation23
15.20 Fire protection systems23
15.21 Engine monitoring and ground operation47
15.22 Engine storage and preservation—3

MODULE 16 — PISTON ENGINE

MODULE 16 — PISTON ENGINENr of questions
A2 A4B1.2 B1.4 B3
Total number for the module:5276
16.1 Fundamentals of piston engines55
16.2 Engine performance35
16.3 Engine construction78
16.4 Engine fuel systems——
16.4.1 Carburettors34
16.4.2 Fuel injection systems24
16.4.3 Electronic engine control24
16.5 Starting and ignition systems55
16.6 Induction, exhaust, and cooling systems34
16.7 Supercharging/turbocharging46
16.8 Lubricants and fuels25
16.9 Lubrication systems34
16.10 Engine indication systems67
16.11 Power plant installation33
16.12 Engine monitoring and ground operation35
16.13 Engine storage and preservation—3
16.14 Alternative piston-engine constructions14

MODULE 17 — PROPELLER

MODULE 17 — PROPELLERNr of questions
A1 A2B1.1 B1.2 B3
Total number for the module:2032
17.1 Fundamentals of propellers58
17.2 Propeller construction45
17.3 Propeller pitch control46
17.4 Propeller synchronising—2
17.5 Propeller ice protection23
17.6 Propeller maintenance36
17.7 Propeller storage and preservation22

AMC — Regulation (EU) No 1321/2014 · ED Decision 2023/019/R · 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.

Ask Metis about AMC1 Appendix II — Basic examination standard (except for category L licence) →

Metis opens with Avioverse in October 2026 · request early access.