The knowledge requirements for the EASA Part-66 licence are structured as a total of 17 modules. Applicants are required to successfully complete between 10 to 13 modular exams, dependant on the licence category.
We provide fully comprehensive study material for all of the modules listed below.
Expand each module (below) for more information:
Module 1 covers the basic arithmetic, algebra and geometry that lays the foundation for the equations used in the modules that follow (physics, electrical fundamentals and electronic fundamentals).
1.1 Arithmetic
1.2 Algebra
1.3 Geometry
The physics module provides knowlegde of matter (structure of atoms, molecules etc), mechanics (forces, movement, energy etc), thermodynamics, optics (light) and sound.
2.1 Matter
2.2 Mechanics
2.3 Thermodynamics
2.4 Optics (Light)
2.5 Wave Motion and Sound
This module provides the fundamental electrical knowledge required for an aircraft maintenance engineer and the basis for the electronic fundamentals module that follows. The content includes electron theory, generation of electricity, capacitance, magnetism, inductance, transformers, generators and motors.
3.1 Electron Theory
3.2 Static Electricity and Conduction
3.3 Electrical Terminology
3.4 Generation of Electricity
3.5 DC Sources of Electricity
3.6 DC Circuits
3.7 Resistance / Resistor
3.8 Power
3.9 Capacitance / Capacitor
3.10 Magnetism
3.11 Inductance / Inductor
3.12 DC Motor / Generator Theory
3.13 AC Theory
3.14 Resistive (R), Capacitive (C) and Inductive (L)
3.15 Transformers
3.16 Filters
3.17 AC Generators
3.18 AC Motors
This module follows on from the electrical fundamentals module and covers components (diodes, transistors and integrated circuits), PCBs (printed circuit boards) as well as including information on different types of servomechanisms (also known as synchros). There are different versions of this module (B1 or B2) as the knowledge requirement is more in-depth for those studying towards a B2 licence.
4.1 Semiconductors
4.2 Printed Circuit Boards
4.3 Servomechanisms
Module 5 includes data, databuses, logic circuits, microprocessors, fibre optics and typical digital aircraft systems.
5.1 Electronic Instrument Systems
5.2 Numbering Systems
5.3 Data Conversion
5.4 Data Buses
5.5 Logic Circuits
5.6 Basic Computer Terminology
5.7 Microprocessors
5.8 Integrated Circuits
5.9 Multiplexing
5.10 Fibre Optics
5.11 Electronic Displays
5.12 Electrostatic Sensitive Devices
5.13 Software Management Control
5.14 Electromagnetic Environment
5.15 Typical Electronic / Digital Aircraft Systems
This module begins by covering the wide range of aircraft materials in use today (such as alloys and composites) enabling students to apply their knowledge of atomic structure from the earlier physics module to understand of the characteristics and properties of these materials. The module then introduces components such as fasteners, pipes, springs, bearings, gears, cables and connectors which feature in the maintenance practices module.
6.1 Aircraft Materials - Ferrous
6.2 Aircraft Materials - Non-Ferrous
6.3 Aircraft Materials - Composite and Non-Metallic
6.4 Corrosion
6.5 Fasteners
6.6 Pipes and Unions
6.7 Springs
6.8 Bearings
6.9 Transmissions
6.10 Control Cables
6.11 Electrical Cables and Connectors
This module focuses on typical aircraft maintenance activities that are performed such as the assembly, inspection and testing of components as well as the associated tools, safety precautions and engineering standards.
7.1 Safety Precautions - Aircraft and Workshop
7.2 Workshop Practices
7.3 Tools
7.4 Avionic General Test Equipment
7.5 Engineering Drawings, Diagrams and Standards
7.6 Fits and Clearances
7.7 Electrical Cables and Connectors
7.8 Riveting
7.9 Pipes and Hoses
7.10 Springs
7.11 Bearings
7.12 Transmissions
7.13 Control Cables
7.14 Material Handling
7.15 Welding, Brazing, Soldering and Bonding
7.16 Aircraft Weight and Balance
7.17 Aircraft Handling and Storage
7.18 Disassembly, Inspection, Repair and Assembly Techniques
7.19 Abnormal Events
7.20 Maintenance Procedures
The basic aerodynamics module builds upon knowledge from the physics module and includes the atmosphere, aerodynamics and the theory of flight.
8.1 Physics of the Atmosphere
8.2 Aerodynamics
8.3 Theory of Flight
8.4 Flight Stability and Dynamics
Within a maintenance environment it is essential that human factors are taken into account. By understanding human performance limitations, social psychology, communication and the factors affecting performance we can minimise the likelihood of incidents attributable to human human error.
9.1 General
9.2 Human Performance and Limitations
9.3 Social Psychology
9.4 Factors Affecting Performance
9.5 Physical Environment
9.6 Tasks
9.7 Communication
9.8 Human Error
9.9 Hazards in the Workplace
This module covers the aviation regulatory framework (such as the role of the ICAO and EASA), certifying staff, aircraft certification and international requirements.
10.1 Regulatory Framework
10.2 JAR 66 - Certifying Staff - Maintenance
10.3 JAR 145 - Approved Maintenance Organisations
10.4 JAR-OPS - Commercial Air Transportation
10.5 Aircraft Certification
10.6 Part-M
10.7 Aircraft National and International Requirements
This extensive module builds upon the knowledge from earlier modules and provides explanations of fixed-wing aerodynamics and all the main systems found in modern civil aircraft: airframe, air conditioning, cabin pressurisation, instruments, electrical power, equipment & furnishings, fire protection, flight controls, fuel systems, hydraulic power, ice & rain protection, landing gear, lights, oxygen, pneumatics, water & waste, onboard maintenance systems, integrated modular avionics (IMA), cabin systems and information systems.
Note that there are two versions of this module available:
11.1 Theory of Flight
11.2 Airframe Structures - General Concepts
11.3 Airframe Structures - Aeroplanes
11.4 Air Conditioning and Cabin Pressurisation (ATA 21)
11.5 Instruments / Avionic Systems
11.6 Electrical Power (ATA 24)
11.7 Equipment and Furnishings (ATA 25)
11.8 Fire Protection (ATA 26)
11.9 Flight Controls (ATA 27)
11.10 Fuel Systems (ATA 28)
11.11 Hydraulic Power (ATA 29)
11.12 Ice and Rain Protection (ATA 30)
11.13 Landing Gear (ATA 32)
11.14 Lights (ATA 33)
11.15 Oxygen (ATA 35)
11.16 Pneumatic/Vacuum (ATA 36)
11.17 Water/Waste (ATA 38)
11.18 On Board Maintenance Systems (ATA 45)
This extensive module builds upon the knowledge from earlier modules and provides explanations of aerodynamics and all the main systems applicable to rotary wing aircraft: airframe, flight control systems, blade tracking & vibration analysis, transmission (gear boxes, clutches etc), air conditioning, instruments, electrical power, equipment & furnishings, fire protection, fuel systems, hydraulic power, ice & rain protection, landing gear, lights, pneumatics, integrated modular avionics (IMA), onboard maintenance systems and information systems.
The content is applicable for those studying towards A3, A4, B1.3 and B1.4 helicopter licences.
12.1 Theory of Flight - Rotary Wing Aerodynamics
12.2 Flight Control Systems
12.3 Blade Tracking and Vibration Analysis
12.4 Transmissions
12.5 Airframe Structures
12.6 Air Conditioning (ATA 21)
12.7 Instruments/Avionic Systems
12.8 Electrical Power (ATA 24)
12.9 Equipment and Furnishings (ATA 25)
12.10 Fire Protection (ATA 26)
12.11 Fuel Systems (ATA 28)
12.12 Hydraulic Power (ATA 29)
12.13 Ice and Rain Protection (ATA 30)
12.14 Landing Gear (ATA 32)
12.15 Lights (ATA 33)
12.16 Pneumatic/Vacuum (ATA 36)
This extensive module builds upon the knowledge from earlier modules and provides explanations of aerodynamics and all the main systems found in modern civil aircraft to a level applicable for those studying towards B2 licences: general concepts of aircraft structures, autoflight, communication, navigation, electrical power, equipment & furnishings, flight controls, instruments, lights, onboard maintenance systems, air conditioning, cabin pressurisation, fire protection, fuel systems, hydraulic power, ice & rain protection, landing gear, oxygen, pneumatics, water & waste, integrated modular avionics (IMA), cabin systems and information systems.
13.1 Theory of Flight
13.2 Structures - General Concepts
13.3 Autoflight (ATA 22)
13.4 Communication / Navigation (ATA 23/34)
13.5 Electrical Power (ATA 24)
13.6 Equipment and Furnishings (ATA 25)
13.7 Flight Controls (ATA 27)
13.8 Instrument Systems (ATA 31)
13.9 Lights (ATA 33)
13.10 On Board Maintenance Systems (ATA 45)
This module provides the knowledge of aircraft engines at a level applicable for those studying towards B2 licences (as they do not study the much more in-depth Module 15: Gas Turbines). It includes a general overview of turbine engines followed by explanations of engine indicating systems and starting & ignition systems.
14.1 Turbine Engines
14.2 Engine Indicating Systems
The substantial content within this module covers gas turbine engine fundamentals, performance, detailed explanations of each section of the engine and the supporting systems. Different types of gas turbine engine are considered and the module also includes installation, monitoring, ground running and storage.
15.1 Fundamentals
15.2 Engine Performance
15.3 Inlet
15.4 Compressors
15.5 Combustion Section
15.6 Turbine Section
15.7 Exhaust
15.8 Bearings and Seals
15.9 Lubricants and Fuels
15.10 Lubrication Systems
15.11 Fuel Systems
15.12 Air Systems
15.13 Starting and Ignition Systems
15.14 Engine Indication Systems
15.15 Power Augmentation Systems
15.16 Turbo-prop Engines
15.17 Turbo-shaft Engines
15.18 Auxiliary Power Units (APUs)
15.19 Powerplant Installation
15.20 Fire Protection Systems
15.21 Engine Monitoring and Ground Operation
15.22 Engine Storage and Preservation
This module provides the knowledge required for those studying towards licences to work on piston engine aircraft (A2, A4, B1.2 and B1.4). The content covers piston engine fundamentals, performance, construction, explanations of the supporting systems and also includes installation, monitoring, ground running and storage.
16.1 Fundamentals
16.2 Engine Performance
16.3 Engine Construction
16.4 Engine Fuel Systems
16.5 Starting and Ignition Systems
16.6 Induction, Exhaust and Cooling Systems
16.7 Supercharging/Turbocharging
16.8 Lubricants and Fuels
16.9 Lubrication Systems
16.10 Engine Indication Systems
16.11 Powerplant Installation
16.12 Engine Monitoring and Ground Operation
16.13 Engine Storage and Preservation
This module covers the fundamentals of propeller design, construction, pitch control, synchronising, ice protection, maintenance and storage.
17.1 Fundamentals
17.2 Propeller Construction
17.3 Propeller Pitch Control
17.4 Propeller Synchronising
17.5 Propeller Ice Protection
17.6 Propeller Maintenance
17.7 Propeller Storage and Preservation