IRImplementing rule
2. Modularisation
Qualification on basic subjects for each aircraft maintenance licence category or subcategory shall be in accordance with the following matrix, where applicable subjects are indicated by an ‘X’, while ‘n/a’ means that the subject module is neither applicable nor required.
| Subject module | B1.1 A1 | B1.2 A2 | B1.E | B1.3 A3 | B1.4 A4 | B3 | B2 | B2L | C |
|---|---|---|---|---|---|---|---|---|---|
| Turbine engine | Piston engine | Aeroplanes with electric power plant and MTOM below 5 700 kg | Turbine engine | Piston engine | Piston-engine non-pressurised aeroplanes MTOM ≤ 2 t | ||||
| 1. MATHEMATICS | X | X | X | X | X | X | X | X | X |
| 2. PHYSICS | X | X | X | X | X | X | X | X | X |
| 3. ELECTRICAL FUNDAMENTALS | X | X | X | X | X | X | X | X | X |
| 4. ELECTRONICS FUNDAMENTALS | X (n/a for A1) | X (n/a for A2) | X | X (n/a for A3) | X (n/a for A4) | X | X | X | X |
| 5. DIGITAL TECHNIQUES/ELECTRONIC INSTRUMENT SYSTEMS | X | X | X | X | X | X | X | X | X |
| 6. MATERIALS AND HARDWARE | X | X | X | X | X | X | X | X | X |
| 7. MAINTENANCE PRACTICES | X | X | X | X | X | X | X | X | X |
| 8. BASIC AERODYNAMICS | X | X | X | X | X | X | X | X | X |
| 9. HUMAN FACTORS | X | X | X | X | X | X | X | X | X |
| 10. AVIATION LEGISLATION | X | X | X | X | X | X | X | X | X |
| 11. AEROPLANE AERODYNAMICS, STRUCTURES AND SYSTEMS | X | X | X | n/a | n/a | X | n/a | n/a | 11, 15 & 17 as B1.1 or 11, 16 & 17 as B1.2 or 11, 17 & 18 as B1.E or 12 & 15 as B1.3 or 12 & 16 as B1.4 or 13 & 14 as B2 |
| 12. HELICOPTER AERODYNAMICS, STRUCTURES AND SYSTEMS | n/a | n/a | n/a | X | X | n/a | n/a | n/a | |
| 13. AIRCRAFT AERODYNAMICS, STRUCTURES AND SYSTEMS | n/a | n/a | n/a | n/a | n/a | n/a | X | X | |
| 14. PROPULSION | n/a | n/a | n/a | n/a | n/a | n/a | X | X | |
| 15. GAS TURBINE ENGINE | X | n/a | n/a | X | n/a | n/a | n/a | n/a | |
| 16. PISTON ENGINE | n/a | X | n/a | n/a | X | X | n/a | n/a | |
| 17. PROPELLER | X | X | X | n/a | n/a | X | n/a | n/a | |
| 18. ELECTRIC POWER PLANT | n/a | n/a | X | n/a | n/a | n/a | n/a | n/a |
IR — Regulation (EU) No 1321/2014 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025