SACAA ATPL(H) Aircraft Technical & General Practice Questions - SACAA Airline Transport Pilot Licence (Helicopter) Aircraft Technical & General Knowledge Examination Exam

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What happens if a dual-channel FADEC system suffers a total electrical failure or dual channel loss in flight on a turbine helicopter equipped with hydromechanical backup?

The system freezes the fuel metering valve at its last valid position or reverts to manual hydro-mechanical control The engine immediately shuts down and cannot be restarted until ground maintenance clears the ECU fault memory The engine accelerates uncontrollably to maximum overspeed until the mechanical N2 governor trips the shutoff valve The standby FADEC channel drains hydraulic pressure to force the fuel control lever to flight idle

Correct Answer:

The system freezes the fuel metering valve at its last valid position or reverts to manual hydro-mechanical control

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