What should be done if a hung start occurs when starting a turbine with an air starter?

In the event of a hung start while using an air starter for a turbine engine, the appropriate action is to shut down the engine. A hung start occurs when the engine does not accelerate to its normal operating speed after the fuel is introduced. Continuing the starting procedure or increasing fuel flow could lead to an unsafe situation, potentially resulting in engine damage or an exceedance of temperature limits.

Shutting down the engine allows for a safe and controlled response to the anomaly. This procedure is crucial to prevent any further complications that might arise from trying to force the engine to start under adverse conditions. After a shutdown, the flight engineer would typically follow specific troubleshooting procedures to diagnose the issue before attempting another start.