What is the duration for which the maximum takeoff ITT can be sustained?

The correct duration for which the maximum takeoff ITT (Inter Turbine Temperature) can be sustained is 5 minutes. This limitation is critical for ensuring the safe operation and longevity of the aircraft's engine. Operating at maximum ITT beyond the specified duration can result in engine overheating, potential damage, or failure. Manufacturers establish these limitations based on extensive testing and analysis of engine performance characteristics, ensuring that pilots operate the aircraft within safe thermal limits during takeoff.

The specified 5-minute limit allows pilots to have sufficient time to achieve takeoff and initial climb power settings while managing the engine temperature within safe operating parameters. Understanding these limitations ensures that operational procedures remain within the design specifications of the aircraft, thereby maximizing safety and reliability.