PNG CASA Basic Gas Turbine study guide
PNG CASA Basic Gas Turbine · Work through your exam, one topic at a time.
The Basic Gas Turbine examination is a PNG CASA licence knowledge assessment for aircraft maintenance engineers who want a gas turbine rating on their licence, or who need to satisfy the authority that they understand turbine engines before working on them under supervision. It is aimed at people with a grounding in airframe and powerplant fundamentals who are moving into turbine-powered types, and at experienced piston-engine engineers extending their scope. The PNG CASA Basic Gas Turbine study guide has 8 sections and about 2,453 words.
01Gas Turbine Engine Fundamentals and Thermodynamics
Domain focus: This section tests the thermodynamic and mechanical principles that explain how a gas turbine produces thrust or shaft power, and how pressure, temperature and velocity change through each module. The engine operates on the Brayton cycle: compression, constant-pressure heat addition, expansion and exhaust.
355 words, about 2 min02Engine Construction, Materials and Components
Domain focus: This section examines how engine modules are built, why different materials are used in cold and hot sections, and how construction features control stress, temperature and clearance. Cold section: fan and compressor blades are commonly titanium alloys or composites; cases may be aluminium or titanium.
345 words, about 2 min03Lubrication, Fuel and Ignition Systems
Domain focus: This section tests the oil, fuel and ignition systems that keep the engine running: how oil is circulated and monitored, how fuel is metered and delivered, and how ignition is used for starting and for relight. A dry-sump system uses a pressure pump to feed oil to bearings and gears, and scavenge pumps to return it to the tank.
371 words, about 2 min04Starting, Operating and Engine Instrumentation
Domain focus: This section covers the start sequence, normal operating checks and the instruments used to monitor the engine, including how to recognise abnormal starts. The starter motores the HP rotor; at a defined N2 the igniters energise and fuel is introduced.
324 words, about 2 min05Engine Performance, Ratings and Limitations
Domain focus: This section tests how engine performance is rated, how environmental and installation factors change thrust or power, and how limitations protect the engine. Ratings include take-off, maximum continuous, cruise and derated take-off.
272 words, about 1 min06Airworthiness, Maintenance Practices and Documentation
Domain focus: This section covers airworthiness and maintenance practice: approved data, inspections, documentation and the release of an engine to service under PNG CASA requirements. Maintenance must follow approved data: the aircraft maintenance manual, component maintenance manual, service bulletins and airworthiness directives.
281 words, about 1 min07Fault Diagnosis and Troubleshooting
Domain focus: This section tests systematic fault diagnosis: using symptoms, data and approved procedures to isolate a fault without replacing parts at random. Define the symptom: high EGT, low thrust, vibration, oil consumption, fuel-flow mismatch, unusual noise or start problem.
261 words, about 1 min08Safety, Human Factors and Regulatory Requirements
Domain focus: This section covers safe engine operation and maintenance, human factors that cause error, and the regulatory framework that requires reporting and records under PNG CASA. Engine hazards include FOD, high-pressure fuel, ignition voltage, hot surfaces, rotating machinery, noise and fire.
244 words, about 1 min