What maximum temperature is allowed for ITT at the initiation of thrust lever movement for ground starts?

The correct maximum temperature allowed for ITT (Interstage Turbine Temperature) at the initiation of thrust lever movement for ground starts is 120°C. This limitation ensures that the engine operates within safe thermal parameters during the critical phase of starting.

By having a maximum ITT of 120°C, it helps prevent potential damage to the engine components that could occur from overheating during the start sequence. Exceeding this temperature can lead to excessive thermal stress, affecting the lifespan and reliability of the engine. Furthermore, the limits are established based on both engine design and testing, ensuring that the operational parameters keep the engine within a safe operating envelope to maintain efficiency and safety.

Understanding this limitation is crucial for flight operation, as adhering to ITT restrictions helps ensure safe engine performance and compliance with operational procedures.