Which value is a max transient ITT limit?

Which value is a max transient ITT limit?

• A. 950 ITT
• B. 920°C ITT
• C. 20 sec
• D. 105% N2

Answer: (A)

Max transient ITT limit means the highest temperature the engine is allowed to reach for a short, transient period during throttle changes. It’s a temperature limit, not a duration or speed limit. Engineers set a higher transient limit than the continuous limit to permit brief spikes without causing damage, while still protecting the engine overall. Among the options, the temperature without a unit and the higher value represent the maximum allowed transient ITT. The other temperature figure is lower, and the remaining options (a time duration and a percentage of N2) are not ITT limits. Therefore, 950 ITT is the max transient ITT limit.

Max transient ITT limit means the highest temperature the engine is allowed to reach for a short, transient period during throttle changes. It’s a temperature limit, not a duration or speed limit. Engineers set a higher transient limit than the continuous limit to permit brief spikes without causing damage, while still protecting the engine overall.

Among the options, the temperature without a unit and the higher value represent the maximum allowed transient ITT. The other temperature figure is lower, and the remaining options (a time duration and a percentage of N2) are not ITT limits. Therefore, 950 ITT is the max transient ITT limit.