During start, at what EGT value should the aircraft be aborted?

During start, at what EGT value should the aircraft be aborted?

• A. 915 C
• B. 925 C
• C. 935 C
• D. 945 C

Answer: (B)

During start, monitoring EGT is essential because it shows whether the engine is light-off properly and not overheating the turbine as fuel is introduced. There is a defined abort limit for EGT during this phase: if the temperature reaches that limit, continuing the start could cause damage, so you shut off fuel and abort the start. This limit is chosen to strike a balance—it’s high enough to allow a normal light-off to proceed, but low enough to catch a malfunction early before temperatures climb into dangerous territory. The value chosen in this context is the one that matches the engine’s documented start-abort specification. It’s not the lowest value, which would cause premature aborts during a normal start, and not the highest value, which could let a bad light-off continue until damage is possible. If the EGT reaches that abort threshold, you follow the start-abort procedure and prepare for a safe retry, ensuring the engine’s temperature and timing stay within acceptable limits.

During start, monitoring EGT is essential because it shows whether the engine is light-off properly and not overheating the turbine as fuel is introduced. There is a defined abort limit for EGT during this phase: if the temperature reaches that limit, continuing the start could cause damage, so you shut off fuel and abort the start. This limit is chosen to strike a balance—it’s high enough to allow a normal light-off to proceed, but low enough to catch a malfunction early before temperatures climb into dangerous territory.

The value chosen in this context is the one that matches the engine’s documented start-abort specification. It’s not the lowest value, which would cause premature aborts during a normal start, and not the highest value, which could let a bad light-off continue until damage is possible. If the EGT reaches that abort threshold, you follow the start-abort procedure and prepare for a safe retry, ensuring the engine’s temperature and timing stay within acceptable limits.