Which of the following is an operational mode of the FADEC?

The operational modes of the FADEC (Full Authority Digital Engine Control) system are crucial for managing engine performance and ensuring safety during various flight operations. One key mode within this system is the alternate control mode. This mode allows the FADEC to operate the engine with reduced functionality in the event of a failure or malfunction in the primary control systems. This capability is vital for maintaining a basic level of control over the engine and ensuring that the aircraft can still operate, albeit in a limited capacity, enhancing safety.

In contrast, while ground mode, throttle mode, and flight mode are terms that describe various operational contexts or functionalities related to engine management, they do not specifically refer to the alternative operational mode provided by FADEC that ensures continued operation under fault conditions. Ground mode and flight mode typically relate to the engine's operational parameters during taxi and cruise, while throttle mode would involve the direct control of the throttle inputs. Therefore, the alternate control mode stands out as the essential operational mode designed primarily for handling specific contingencies within the FADEC system.