What action is required for the PCL during an immediate airstart?

For an immediate airstart, the correct action for the Power Control Lever (PCL) is to set it to IDLE when the N1 (first shaft speed) is above 13%. This action is essential because it allows the engine to receive fuel and air necessary for combustion, enabling the restart process to occur successfully.

Setting the PCL to IDLE ensures that the engine can spin up quickly without risking damage from an excessive fuel flow that might occur if it were set to a higher power setting. Additionally, maintaining the condition of the engine during the restart is critical, as it minimizes the risk of a further in-flight emergency.

When N1 is below 13%, the engine is typically not in a position to restart effectively, and that's why the PCL must remain in the IDLE position during conditions of low N1, allowing for a proper start sequence when conditions become favorable.

The other options do not align with the airstart procedure. For instance, setting the PCL to OFF would not provide any fuel to the engine, making it impossible to restart. Keeping it at NORM does not take into consideration the critical N1 parameters that must be monitored for a successful airstart. Therefore, the procedure adher