In the case of engine failure, which system assists in power management?

The correct answer is FADEC, which stands for Full Authority Digital Engine Control. This system is crucial for managing engine performance and ensuring optimal operation, especially in situations such as engine failure. FADEC automatically adjusts various parameters, such as fuel flow and engine thrust, to maintain performance within safe operating limits. It allows for precise control of the engines, enabling pilots to respond effectively in emergencies.

FADEC also enhances safety by providing a more reliable and efficient way to manage engine functions without the overwhelming necessity for manual intervention by the flight crew. By simplifying the engine control process, it allows pilots to focus on other critical aspects of managing the aircraft during an emergency.

The other systems listed serve different purposes. EFIS, or Electronic Flight Instrument System, provides pilots with crucial flight data but does not directly manage engine power. The OVHD system pertains to overhead functions and controls unrelated to direct engine management. ECAM, or Electronic Centralized Aircraft Monitor, gives important information about the aircraft's systems, including alerts for engine malfunctions, but it does not control the engine's performance itself. Therefore, FADEC is specifically designed for engine power management, making it the right choice in this scenario.