EASA Part66 Exam: Number of Questions Per Module
New to the licence? Start with our EASA Part 66 overview — the modules, categories and exam format explained.
Information on this page is based on Commission Implementing Regulation (EU) 2023/989, Appendix II (Examination Standard). View full regulation.
Sitting an essay module? Module 7 — and, for UK CAA candidates, Modules 9 and 10 — is examined partly by written essay. See 60 worked model essay answers →
1. Mathematics
Category A: 16 multi-choice questions, 20 minutes.
Category B1, B2, B2L, B3: 32 multi-choice questions, 40 minutes.
2. Physics
Category A, B3: 32 multi-choice questions, 40 minutes.
Category B1, B2, B2L: 52 multi-choice questions, 65 minutes.
3. Electrical Fundamentals
Category A: 20 multi-choice questions, 25 minutes.
Category B3: 24 multi-choice questions, 30 minutes.
Category B1, B2, B2L: 52 multi-choice questions, 65 minutes.
4. Electronic Fundamentals
Category B1, B3: 20 multi-choice questions, 25 minutes.
Category B2, B2L: 40 multi-choice questions, 50 minutes.
5. Digital Techniques, Electronic Instrument Systems
Category A, B3: 20 multi-choice questions, 25 minutes.
Category B1: 40 multi-choice questions, 50 minutes.
Category B2, B2L: 72 multi-choice questions, 90 minutes.
6. Materials and Hardware
Category A: 52 multi-choice questions, 65 minutes.
Category B1, B3: 80 multi-choice questions, 100 minutes.
Category B2, B2L: 60 multi-choice questions, 75 minutes.
7. Maintenance Practices
Category A: 76 multi-choice and 2 essay questions, 95 minutes plus 40 minutes.
Category B1, B3: 80 multi-choice and 2 essay questions, 100 minutes plus 40 minutes.
Category B2, B2L: 60 multi-choice and 2 essay questions, 75 minutes plus 40 minutes.
8. Basic Aerodynamics
Category A, B1, B2, B2L, B3: 24 multi-choice questions, 30 minutes.
9. Human Factors
Category A, B1, B2, B2L, B3: 28 multi-choice questions, 35 minutes.
10. Aviation Legislation
Category A: 32 multi-choice questions, 40 minutes.
Category B1, B2, B2L, B3: 44 multi-choice questions, 55 minutes.
11. Aeroplane Aerodynamics, Structures and Systems
Category A1: 108 multi-choice questions, 135 minutes.
Category A2: 72 multi-choice questions, 90 minutes.
Category B1.1: 140 multi-choice questions, 175 minutes.
Category B1.2: 100 multi-choice questions, 125 minutes.
Category B3: 60 multi-choice questions, 75 minutes.
12. Helicopter Aerodynamics, Structures and Systems
Category A3, A4: 100 multi-choice questions, 125 minutes.
Category B1.3, B1.4: 128 multi-choice questions, 160 minutes.
13. Aircraft Aerodynamics, Structures and Systems
Category B2: 188 multi-choice questions, 235 minutes.
Questions and time allowed may be split into two examinations as appropriate.
Category B2L (by system rating):
Basic: 20 multi-choice questions, 25 minutes.
COM/NAV: 40 multi-choice questions, 50 minutes.
Instruments: 52 multi-choice questions, 65 minutes.
Autoflight: 28 multi-choice questions, 35 minutes.
Surveillance: 28 multi-choice questions, 35 minutes.
Airframe Systems: 40 multi-choice questions, 50 minutes.
14. Propulsion
Category B2, B2L: 32 multi-choice questions, 40 minutes.
B2L applies to Instruments and Airframe Systems ratings only.
15. Gas Turbine Engine
Category A1, A3: 60 multi-choice questions, 75 minutes.
Category B1.1, B1.3: 92 multi-choice questions, 115 minutes.
16. Piston Engine
Category A2, A4: 52 multi-choice questions, 65 minutes.
Category B1.2, B1.4, B3: 76 multi-choice questions, 95 minutes.
17. Propeller
Category A1, A2: 20 multi-choice questions, 25 minutes.
Category B1.1, B1.2, B3: 32 multi-choice questions, 40 minutes.
Free download
How to Become a Licensed Aircraft Engineer
The complete EASA Part-66 handbook — licence categories, all 17 modules, exam format and pass marks, experience and OJT, the rules in 11 countries, type ratings and continuation training. Includes 255 practice questions with explanations. 2026 Edition, PDF.
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