12 Questions
What is the purpose of obtaining start clearance from fireguard or observer?
To ensure safety by avoiding jet efflux danger zones
Which of the following is NOT included as a limit to observe when carrying out engine runs?
Fuel consumption rate
What is the significance of observing turbine gas temperature limits during engine runs?
To avoid exceeding structural damage limits
Why is it important to have the power lead removed after starting the engine with external power?
To avoid exceeding starter duration and engagement limits
What aspect of engine performance assessment requires particular emphasis during engine runs?
Reading instruments accurately
Which of the following is a potential danger area during engine runs?
Engine intake suction
What is the purpose of emergency procedures in aviation?
To prevent damage to engine or aircraft components
Why is it important to read instruments accurately in aviation?
To avoid parallax errors
What should operators do when encountering an emergency situation?
Immediately follow relevant corrective actions and/or shut down procedures
Which of the following is NOT listed as a potential emergency situation that could be encountered?
Engine power outage
Why is it crucial to detect unsafe situations promptly during an engine run?
To prevent damage to aircraft components
What is one potential consequence of inaccurate instrument reading during an engine run?
Incorrect engine adjustments or component rejection
Study Notes
Quick Reaction and Crew Co-operation
- Quick reaction times and crew co-operation are essential to prevent or minimize aircraft damage and/or crew injury in all emergency situations.
Engine Fire Checklist
- A turbopropeller engine fire checklist includes:
- Fire warning
- Throttle retard to shut-off
- Propeller condition lever select feather
- Fire handle selected (pulled)
- Fire bottle button select first shot
- Radio call to airfield tower for fire-crew assistance
- Other engine(s) shut down
- Fire bottle button select second shot if fire warning light is not out
- Batteries/ground power off
- Vacate aircraft and ensure all non-essential crew vacate the aircraft and proceed to the designated assembly point
- Head count completed
Feathering Propellers
- Propellers are feathered to prevent personnel from walking into a propeller that is still running down.
- Feathering a propeller drives the blades into a coarse pitch position, which aids in rapid engine shut down.
- Feathering a propeller also ensures that the engine's shut-off valve isolates fluid movement to and from the engine.
Engine Start Procedure
- Obtain start clearance from fireguard or observer.
- Carry out start procedure, taking care to remain within:
- Turbine gas temperature limits
- RPM limits
- Oil pressure limits
- Starter duration and engagement limits
- Carry out relevant post-start checks once the engine has started and stabilized at idle.
- Have power lead removed if external power was used to start the engine(s).
Engine Limits
- Engine limits to observe include:
- RPM or torque limits during ground runs to prevent structural damage to aircraft and engine mounting
- Turbine gas temperature limits
- Oil temperature and pressure limits
- Engine hot soak limits prior to recording engine parameters
- Engine load restrictions when recording engine parameters
- Wind direction and strength
Instrument Reading
- Engine parameters are observed by operators during engine runs or during flight.
- Particular emphasis is placed on reading instruments accurately when assessing engine performance.
- Instrument reading errors can occur due to parallax error.
- Incorrect engine adjustments or component rejection could result from inaccurate instrument reading.
Emergency Procedures
- Emergency procedures are carried out upon detection of an unsafe situation that could damage an engine or aircraft component, or endanger personnel.
- Emergency situations require immediate action and follow relevant corrective actions and/or shut-down procedures.
- Examples of emergency situations include:
- Engine fire
- Engine overheat
- Turbine overheat
- Aircraft fire
- Leading edge overheat
- Engine runaway
- Engine seizure
- Oil pressure out of limits
- Oil loss
- Engine fuel leak
- Wheel well hydraulic leak.
Test your knowledge on the importance of accurate instrument reading, the impact of parallax error, and how to avoid incorrect engine adjustments or component rejection. The quiz is based on Figure 8 from the DEFENCE AEROSKILLS TRAINING ACADEMY materials.
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