Under what engine condition does the ENG FAIL alert appear within the EGT display?

Under what engine condition does the ENG FAIL alert appear within the EGT display?

• A. The engine is operating below 50% N2 with the start lever in IDLE.
• B. The engine is operating above 50% N2 with the start lever in IDLE.
• C. The engine is operating below 50% N2 with the start lever in RUN.
• D. The engine is operating above 50% N2 with the start lever in RUN.

Answer: (A)

The ENG FAIL alert on the EGT display is a startup fault indication. During start, the engine should spool up to a sufficient speed (N2) while the start lever is in IDLE. If the N2 remains below about 50% with the lever still in IDLE, the system interprets this as a failure to start properly and flags ENG FAIL to warn the crew. Once you move the lever to RUN, the engine is being commanded to run and this particular startup fault condition isn’t applicable in the same way; the alert would only appear for an actual failure to reach the required spool while in the idle/start phase. So, the condition that triggers ENG FAIL is the engine being below 50% N2 with the start lever in IDLE.

The ENG FAIL alert on the EGT display is a startup fault indication. During start, the engine should spool up to a sufficient speed (N2) while the start lever is in IDLE. If the N2 remains below about 50% with the lever still in IDLE, the system interprets this as a failure to start properly and flags ENG FAIL to warn the crew. Once you move the lever to RUN, the engine is being commanded to run and this particular startup fault condition isn’t applicable in the same way; the alert would only appear for an actual failure to reach the required spool while in the idle/start phase. So, the condition that triggers ENG FAIL is the engine being below 50% N2 with the start lever in IDLE.