The pilot shall initiate a shutdown if TOT rises rapidly and appears it will exceed what temperature (hot start)?

The pilot shall initiate a shutdown if TOT rises rapidly and appears it will exceed what temperature (hot start)?

• A. 750 degrees C
• B. 800 degrees C
• C. 700 degrees C
• D. 850 degrees C

Answer: (A)

Hot start situations happen when the turbine inlet/outlet temperature rises faster than the engine can safely handle during start. If fuel keeps flowing and the temperature trend is headed toward a high limit, continuing the start risks overheating the turbine and causing damage to blades and other components. The procedure is to shut the engine down when TOT is climbing rapidly and appears it will exceed the specified limit, which for this scenario is 750°C. This threshold provides an early, protective cutoff before the temperatures reach more extreme (and more damaging) levels. Shooting for 750°C as the shutdown cue keeps you from pushing into ranges that are more risky and closer to the engine’s hot-start limits. Choosing a higher number would delay shutdown and increase the chance of damage, while a much lower number would cause unnecessary shutdowns during normal starts.

Hot start situations happen when the turbine inlet/outlet temperature rises faster than the engine can safely handle during start. If fuel keeps flowing and the temperature trend is headed toward a high limit, continuing the start risks overheating the turbine and causing damage to blades and other components. The procedure is to shut the engine down when TOT is climbing rapidly and appears it will exceed the specified limit, which for this scenario is 750°C. This threshold provides an early, protective cutoff before the temperatures reach more extreme (and more damaging) levels. Shooting for 750°C as the shutdown cue keeps you from pushing into ranges that are more risky and closer to the engine’s hot-start limits. Choosing a higher number would delay shutdown and increase the chance of damage, while a much lower number would cause unnecessary shutdowns during normal starts.