Module 17
Module 17: Propeller
A1 A2 B1.1 B1.2 B1.E B3
Commission Implementing Regulation (EU) 2023/989 amending Regulation (EU) No 1321/2014, Annex III (Part-66), Appendix I; as amended by Commission Implementing Regulation (EU) 2025/111 12 June 2024; amended from 13 February 2026
Knowledge Level Overview
| Ref | Topic | A1 | A2 | B1.1 | B1.2 | B1.E | B3 |
|---|---|---|---|---|---|---|---|
| 17.1 | Fundamentals | 1 | 1 | 2 | 2 | 2 | 2 |
| 17.2 | Propeller construction | 1 | 1 | 2 | 2 | 2 | 2 |
| 17.3 | Propeller pitch control | 1 | 1 | 2 | 2 | 2 | 2 |
| 17.4 | Propeller synchronising | — | — | 2 | 2 | 2 | 2 |
| 17.5 | Propeller ice protection | 1 | 1 | 2 | 2 | 2 | 2 |
| 17.6 | Propeller maintenance | 1 | 1 | 3 | 3 | 3 | 3 |
| 17.7 | Propeller storage and preservation | 1 | 1 | 2 | 2 | 2 | 2 |
Knowledge levels: 1 = basic familiarisation, 2 = general knowledge, 3 = detailed knowledge. A dash (—) means the topic is not required for that category.
Note: In Appendix I the levels are listed under two combined columns — A1 and A2 share identical requirements, as do B1.1, B1.2, B1.E and B3. B1.E was added by Regulation (EU) 2025/111, applicable from 13 February 2026.
1 Basic familiarisation
2 General knowledge
3 Detailed knowledge
Examination
| Category | Questions | Duration |
|---|---|---|
| A1 / A2 | 20 | 25 min |
| B1.1 / B1.2 / B1.E / B3 | 32 | 40 min |
B1.E is grouped with B1.1, B1.2 and B3 in EASA's question distribution (AMC1 to Appendix II). The regulation's Appendix II, point 2.17, still names only B1.1, B1.2 and B3.
Detailed Syllabus
17.1Fundamentals
- Blade element theory
- High/low blade angle, reverse angle, angle of attack, rotational speed
- Propeller slip
- Aerodynamic, centrifugal, and thrust forces
- Torque
- Relative airflow on blade angle of attack
- Vibration and resonance
17.2Propeller Construction
- Construction methods and materials used in wooden, composite and metal propellers
- Blade station, blade face, blade shank, blade back/thrust face and hub assembly
- Fixed pitch, controllable pitch, constant speeding propeller
- Propeller/spinner installation
17.3Propeller Pitch Control
- Speed control and pitch change methods, mechanical and electrical/electronic
- Feathering and reverse pitch
- Overspeed protection
17.4Propeller Synchronising
- Synchronising and synchrophasing equipment
17.5Propeller Ice Protection
- Fluid and electrical de-icing equipment
17.6Propeller Maintenance
- Static and dynamic balancing
- Blade tracking
- Assessment of blade damage, erosion, corrosion, impact damage, delamination
- Propeller treatment/repair schemes
- Propeller engine running
17.7Propeller Storage and Preservation
- Propeller preservation and depreservation