Module 15
Module 15: Gas Turbine Engine
A1 A3 B1.1 B1.3
Commission Implementing Regulation (EU) 2023/989 amending Regulation (EU) No 1321/2014, Annex III (Part-66), Appendix I 12 June 2024
Knowledge Level Overview
| Section | Topic | A1/A3 | B1.1/B1.3 |
|---|---|---|---|
| 15.1 | Fundamentals | 1 | 2 |
| 15.2 | Engine Performance | — | 2 |
| 15.3 | Inlet | 2 | 2 |
| 15.4 | Compressors | 1 | 2 |
| 15.5 | Combustion Section | 1 | 2 |
| 15.6 | Turbine Section | 2 | 2 |
| 15.7 | Exhaust | 1 | 2 |
| 15.8 | Bearings and Seals | — | 2 |
| 15.9 | Lubricants and Fuels | 1 | 2 |
| 15.10 | Lubrication Systems | 1 | 2 |
| 15.11 | Fuel Systems | 1 | 2 |
| 15.12 | Air Systems | 1 | 2 |
| 15.13 | Starting and Ignition Systems | 1 | 2 |
| 15.14 | Engine Indication Systems | 1 | 2 |
| 15.15 | Alternate Turbine Constructions | — | 1 |
| 15.16 | Turboprop Engines | 1 | 2 |
| 15.17 | Turboshaft Engines | 1 | 2 |
| 15.18 | Auxiliary Power Units (APUs) | 1 | 2 |
| 15.19 | Powerplant Installation | 1 | 2 |
| 15.20 | Fire Protection Systems | 1 | 2 |
| 15.21 | Engine Monitoring and Ground Operation | 1 | 3 |
| 15.22 | Engine Storage and Preservation | — | 2 |
1 Basic familiarisation
2 General knowledge
3 Detailed knowledge
Examination
| Category | Questions | Duration |
|---|---|---|
| A1 / A3 | 60 | 75 min |
| B1.1 / B1.3 | 92 | 115 min |
Detailed Syllabus
15.1Fundamentals
- Potential energy, kinetic energy, Newton's laws of motion, Brayton cycle
- Force, work, power, energy, velocity, acceleration
- Constructional arrangement and operation of turbojet, turbofan, turboshaft, turboprop
15.2Engine Performance (B1 only)
- Gross thrust, net thrust, choked nozzle thrust, thrust distribution, resultant thrust
- Thrust horsepower, equivalent shaft horsepower, specific fuel consumption
- Engine efficiencies
- Bypass ratio and engine pressure ratio
- Pressure, temperature and velocity of the gas flow
- Engine ratings, static thrust, influence of speed/altitude/hot climate, flat rating, limitations
15.3Inlet
- Compressor inlet ducts
- Effects of various inlet configurations
- Ice protection
15.4Compressors
- Axial and centrifugal types: constructional features, operating principles, applications
- Fan balancing, operation
- Compressor stall and surge: causes and effects
- Airflow control: bleed valves, variable inlet guide vanes, variable stator vanes
- Compressor ratio
15.5Combustion Section
- Constructional features and principles of operation
15.6Turbine Section
- Operation and characteristics of different turbine blade types
- Blade to disk attachment
- Nozzle guide vanes
- Turbine blade stress and creep
15.7Exhaust
- Constructional features and principles of operation
- Convergent, divergent and variable area nozzles
- Engine noise reduction
- Thrust reversers
15.8Bearings and Seals (B1 only)
- Constructional features and principles of operation
15.9Lubricants and Fuels
- Properties and specifications
- Fuel additives
- Safety precautions
15.10Lubrication Systems
- System operation/layout and components
15.11Fuel Systems
- Engine control and fuel metering systems including FADEC
- Systems layout and components
15.12Air Systems
- Engine air distribution and anti-ice control systems
- Internal cooling, sealing, and external air services
15.13Starting and Ignition Systems
- Engine start systems and components
- Ignition systems and components
- Maintenance safety requirements
15.14Engine Indication Systems
- EGT / ITT
- Engine thrust indication: EPR, turbine discharge pressure
- Oil pressure and temperature
- Fuel pressure and flow
- Engine speed, vibration measurement
- Torque, power
15.15Alternate Turbine Constructions (B1 only, NEW)
- Geared turbofan
- Variable fan blades
- Open rotor / propfan
- Hybrid turbine electric concepts and electronic power augmentation
15.16Turboprop Engines
- Gas coupled / free turbine and gear coupled turbines
- Reduction gears
- Integrated engine and propeller controls
- Overspeed safety devices
15.17Turboshaft Engines
- Arrangements, drive systems, reduction gearing, couplings, control systems
15.18Auxiliary Power Units (APUs)
- Purpose, operation, protective systems
15.19Powerplant Installation
- Firewalls, cowlings, acoustic panels, engine mounts, anti-vibration mounts
- Hoses, pipes, feeders, connectors, wiring looms
- Control cables and rods, lifting points and drains
15.20Fire Protection Systems
- Detection and extinguishing systems
15.21Engine Monitoring and Ground Operation (Level 3 for B1)
- Procedures for starting and ground run-up
- Interpretation of engine power output and parameters
- Trend monitoring (oil analysis, vibration, borescope)
- Engine inspection to manufacturer criteria, tolerances and data
- Compressor washing/cleaning
- Foreign object damage
15.22Engine Storage and Preservation (B1 only)
- Preservation and de-preservation for engine and accessories/systems