What must be done if a hot start is interrupted with residual ITT above 500 degrees Celsius?

When a hot start occurs, it is characterized by excessive temperature during the start sequence, indicated by an uncontrolled rise in Engine Gas Temperature (EGT) or ITT (Interturbine Temperature). If this situation is interrupted but the residual ITT remains above 500 degrees Celsius, the appropriate response is to conduct a dry motoring procedure.

This procedure involves rotating the engine to allow for cooling and to prevent any further increase in temperature. By using dry motoring, you can help to dissipate heat from the engine and reduce the risk of damage. The engine is typically cranked without fuel, ensuring that any residual fuel does not ignite, which would exacerbate the hot start situation. This also allows the engine components to cool properly before a safe restart can be attempted.

Attempting to restart immediately at this temperature would risk further complications, including potential engine damage or another hot start. Notifying air traffic control, while important in various situations, is not a direct corrective action for engine performance issues. Lastly, waiting for an arbitrary cool-down period can be inefficient and does not guarantee that the engine has cooled enough to safely attempt another start without following the proper procedures. Therefore, conducting a dry motoring procedure is the critical step to take in response to