The safety feature built into the FADEC training logic ensures that the idled engine will provide power up to the actual ______ stop in NR mismanagement.

• A. OEI
• B. NR limit
• C. MAX RPM
• D. Torque limit

Answer: (A)

During NR mismanagement, the FADEC training logic includes a safety boundary for single-engine operation. It ensures that an idled engine can still deliver power up to the One Engine Inoperative (OEI) stop. This keeps rotor speed and control within safe margins when one engine is not providing full authority, giving enough power to maintain or transition to safe flight without pushing beyond what the remaining engine and rotor system can safely handle.

The OEI stop is the boundary specific to operating with one engine inoperative, which is why it’s the correct choice here. Other limits describe different scenarios (like absolute rotor speed limits or engine torque) and don’t specifically reflect the single-engine operating condition addressed by this safety logic.