What happens if the PCL is moved to idle after the engine has started and is shutting down?

• A. The engine will safely restart
• B. Severe damage could occur to the engine
• C. The fuel system will drain
• D. The aircraft will automatically shut down

Answer: (B)

The correct answer centers on the significant risk of severe engine damage if the Power Control Lever (PCL) is moved to the idle position during the shutdown phase. When the engine is started and running, it requires a certain amount of fuel and airflow to maintain operation. By moving the PCL to idle while the engine is in a shutdown state, the engine can experience inadequate lubrication and cooling, leading to increased wear or potential failure of engine components.

During the shutdown process, various safety mechanisms take place, and the engine is transitioning to an off state. However, interruption of this process through sudden changes in power settings can lead to stress on the engine.

This understanding emphasizes the importance of following specific protocols during engine operation and shutdown to maintain the safety and integrity of the aircraft.