Under OEI conditions, what is the engine takeoff thrust time limit?

Under OEI conditions, what is the engine takeoff thrust time limit?

• A. 5 minutes
• B. 10 minutes
• C. 7 minutes
• D. 12 minutes

Answer: (B)

During takeoff with one engine inoperative, there is a limit on how long you may run the remaining engine at takeoff thrust. This limit exists because taking off on only one engine at high thrust puts extra thermal and mechanical stress on that engine, so the aircraft is allowed a finite window to achieve a safe climb and accelerate to a point where single-engine operation is sustainable. For this aircraft, that window is ten minutes. After reaching that time, you must reduce thrust and follow OEI procedures to avoid overheating or excessive wear on the live engine. The other durations are not the specified limit for this airplane.

During takeoff with one engine inoperative, there is a limit on how long you may run the remaining engine at takeoff thrust. This limit exists because taking off on only one engine at high thrust puts extra thermal and mechanical stress on that engine, so the aircraft is allowed a finite window to achieve a safe climb and accelerate to a point where single-engine operation is sustainable. For this aircraft, that window is ten minutes. After reaching that time, you must reduce thrust and follow OEI procedures to avoid overheating or excessive wear on the live engine. The other durations are not the specified limit for this airplane.