The EPECS will abort a start if the ITT is expected to exceed what temperature?

• A. 945 degrees C
• B. 900 degrees C
• C. 1000 degrees C
• D. 980 degrees C

Answer: (A)

During a start, ITT climbs as fuel is introduced to light off the turbine. The EPECS watches this rise and uses a defined abort limit to protect the engine. If ITT would be allowed to reach 945°C or higher, the system will abort the start before damage can occur. This value sits below the maximum ITT the engine can tolerate in normal operation, yet high enough to catch a start that isn’t progressing properly, providing a safe margin. Other listed temperatures aren’t used as the start-abort trigger because they either correspond to different operating limits or exceed the designed protective threshold.