What action should you take if the PCL is moved before N1 reaches 60% on engine start?

If the Power Control Lever (PCL) is moved before the N1 (low-pressure rotor speed) reaches 60% during engine start, the appropriate action is to abort the engine start. This is critical because moving the PCL prematurely can lead to an unstable start and compromise engine safety. It may result in issues such as an incomplete combustion process, leading to the risk of a hot start, hung start, or even engine damage due to excessive fuel accumulation in the combustion chamber.

By aborting the start immediately, you minimize these risks and protect the integrity of the engine. Once the engine start procedure is aborted, the appropriate troubleshooting measures can be taken to ensure a safe and successful restart.