Are Engines High Power Schedule Switchlight permitted during normal operations?

Are Engines High Power Schedule Switchlight permitted during normal operations?

• A. Yes, it is permitted
• B. No, it is prohibited
• C. Only with instructor authorization
• D. Only on the ground

Answer: (B)

During normal operations, thrust is managed within the standard engine power schedule controlled by the FADEC and throttle levers. The Engines High Power Schedule Switchlight is a specialized control that forces the engines into a high thrust state outside the normal power envelope. Using it would bypass normal protections and could push engine parameters beyond safe limits, or upset aircraft performance and controllability. That's not allowed for routine flight. It’s reserved for non-normal procedures, testing, or maintenance under approved conditions, not for standard operations.

During normal operations, thrust is managed within the standard engine power schedule controlled by the FADEC and throttle levers. The Engines High Power Schedule Switchlight is a specialized control that forces the engines into a high thrust state outside the normal power envelope. Using it would bypass normal protections and could push engine parameters beyond safe limits, or upset aircraft performance and controllability. That's not allowed for routine flight. It’s reserved for non-normal procedures, testing, or maintenance under approved conditions, not for standard operations.