Module 15 Gas Turbine Engine
Gas-turbine principles, construction, compressors, combustion, turbines, systems, control, indication and maintenance.
How to prepare for UK Part-66 basic-knowledge examinations
Fix the intended A, B1, B2, B2L, B3, L or C route; use the regulatory module matrix and knowledge levels; then rehearse the exact MCQ and essay components that apply to each selected module.
Core concepts
Concept 1
The Brayton-cycle energy path links intake, compression, combustion, turbine work and exhaust thrust or shaft output.
Exam cue: Trace gas path and shaft system separately, then connect their measurements.
Concept 2
Engine construction, bearings, seals, lubrication, fuel, air, control, starting, ignition and indication must be understood as an integrated system.
Exam cue: Use parameter relationships to test whether an indication is physically plausible.
Concept 3
Inspection, ground running, trend data and limitations support evidence-based serviceability decisions.
Exam cue: Apply ingestion, fire, hot-section and rotating-equipment safety controls.
Risk pitfalls and guardrails
Confusing gas-generator speed with free-turbine or propeller speed.
Guardrail: Do not mix Category A, B1, B2/B2L, B3 or Category L module variants, or treat the aggregate 601-item study allocation as an official CAA examination total.
Interpreting one parameter without engine condition and ambient context.
Guardrail: Do not mix Category A, B1, B2/B2L, B3 or Category L module variants, or treat the aggregate 601-item study allocation as an official CAA examination total.
Running outside approved limits to reproduce a fault.
Guardrail: Do not mix Category A, B1, B2/B2L, B3 or Category L module variants, or treat the aggregate 601-item study allocation as an official CAA examination total.
Memory anchors
Gas Path
Intake, compressor, combustor, turbine and exhaust form the basic flow path.
Shaft Work
The turbine extracts energy to drive the compressor and useful output.
Control
Fuel and variable geometry are controlled to meet demand within limits.
Trend
Compare repeatable parameters over time to detect deterioration.
Safety
Respect intake, exhaust, fire, heat and high-speed rotating hazards.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What is the basic sequence of energy conversion in a simple gas-turbine engine?
What drives the compressor in a gas-turbine engine?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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