What should be done first if an immediate airstart is required?

In the context of an immediate airstart procedure, the first action that should be taken is to move the Power Control Lever (PCL) to the OFF position. This step is critical because it isolates the fuel supply to the engine, preventing further fuel flow and mitigating the risk of a fire or an uncontrolled fuel leak while attempting to restart the engine. By turning the PCL off, the pilot ensures that the engine is not receiving fuel, which is a necessary precaution when initiating a restart sequence under abnormal conditions.

This action sets the stage for subsequent steps in the airstart procedure, ensuring that the engine is in the proper state for a controlled re-ignition. Following this step, the pilot would typically proceed with the starter switch to AUTO/RESET, check engine instruments, and then reposition the PCL as needed at the appropriate N1. However, initiating the airstart process with the PCL in the OFF position is crucial for safety and effectiveness.