When should the PMU terminate the engine start sequence?

The engine start sequence should be terminated if a hung start is projected. A hung start occurs when the engine fails to reach the required RPM or power output during the initiation phase of the start sequence, which can indicate a problem that might lead to an engine failure or damage. Recognizing and effectively responding to a hung start is crucial for preventing potential hazards, as continuing the start could exacerbate the situation.

Terminating the start sequence during a hung start allows the crew to safely assess and manage the situation, ensuring that any underlying issues are properly addressed before attempting another start procedure. This action promotes safety and preserves the integrity of the engine. It’s essential for the personnel involved in the process to be aware of the proper procedures to follow in these scenarios to minimize risks and maintain operational readiness.