What is the TOGA ITT limit for two minutes?

• A. 964C
• B. 948C
• C. 960C
• D. 970C

Answer: (A)

The main concept here is the engine ITT limit in TOGA mode and how long you can hold it at a high thrust setting. When you command TOGA, the engine is operating at peak thrust and ITT (turbine inlet temperature) rises rapidly. To protect the turbine from overheating, there are time-limited limits: you’re allowed to sustain a higher ITT for only a certain duration during takeoff or go-around. For two minutes in TOGA, the maximum ITT you may reach is 964 C. This value is chosen to provide the necessary takeoff performance while keeping turbine components within safe thermal limits. If ITT nears this cap, you’d maintain the thrust until the two-minute window is up, then you should reduce thrust to stay within the appropriate limits for longer-term operation. The other numbers listed don’t correspond to the two-minute TOGA limit, as they reflect different limits or conditions.