What is the maximum continuous ITT limit?

The maximum continuous ITT (Interstage Turbine Temperature) limit for the King Air 350 is indeed 820°C. This value is a critical operational limitation as it defines the maximum temperature that the turbine can safely operate at for extended periods without incurring damage or significantly affecting the engine’s longevity and performance. Maintaining the ITT within this limit ensures that the engine operates efficiently while minimizing the risks of overheating, which can lead to engine failure or costly repairs.

While options like 750°C, 800°C, and 900°C might seem plausible, they do not align with the operational guidelines established for the King Air 350. 750°C and 800°C are both below the maximum continuous limit, meaning they could potentially be limits for other conditions or thrust settings, but they do not apply here as the maximum continuous operational limit. On the other hand, 900°C exceeds the safe operational threshold and could lead to significant damage if maintained. Thus, 820°C is the specified limit that pilots and operators must adhere to for continuous operation of the King Air 350's engines.