Besides engine speed and fuel, FADEC manages what?

• A. Other parameters for safe, efficient operation.
• B. Pilot input to control surfaces.
• C. Aircraft lighting and cabin environment.
• D. Landing gear retraction.

Answer: (A)

FADEC is a Full Authority Digital Engine Control that governs the engine beyond just speed and fuel. It uses a network of sensors to monitor parameters such as N1/N2 speeds, EGT, fuel flow, pressures, and temperatures, and then adjusts multiple engine functions to keep performance safe and efficient. These functions include fuel scheduling, ignition timing, variable geometry or bleed control, anti-ice logic, and protection features that prevent compressor surge, over-temperature, or other faults. By coordinating these aspects, FADEC optimizes engine operation across a wide range of flight conditions and potential faults.

That broader control is why the description “other parameters for safe, efficient operation” fits best. It does not handle pilot inputs to control surfaces, aircraft lighting/cabin environment, or landing gear retraction, which are managed by other aircraft systems, not the engine control itself.