FADEC derated limits are used to prevent the use of which power setting during training?

• A. Actual OEI Power
• B. MGB Power
• C. Rotor RPM Power
• D. Engine Bleed

Answer: (A)

FADEC derated limits are used to keep training within safe engine and rotor RPM margins by reducing the maximum engine power available. This setup prevents the pilot from selecting the actual one-engine-inoperative (OEI) power, which could push the system into a less safe envelope during training scenarios. By limiting to a derated level, you can practice OEI-like handling and procedures without commanding full OEI power.

Other options don’t represent pilot-selectable engine power settings. MGB power relates to gearbox output, rotor RPM isn’t a selectable power setting, and engine bleed is a system for air supply, not a throttle or power limit.