LO 021.11.03.02.03: Describe a FADEC as a full-authority dual-channel system including functions such as an electronic engine control unit, wiring, sensors, variable vanes, active clearance control, bleed configuration, electrical signalling of thrust lever angle (TLA) (see also AMC to CS-E-50), and an EGT protection function and engine overspeed.

The Full Authority Digital Engine Control (FADEC) system offers a digitalised alternative to hydromechanical engine control. The system has several functions and consists of many different parts, including the peripherals that the pilot interacts with, the associated wiring and electronics as well as the Electronic engine control unit (EEC/ECU) ,which is the main computer. The EEC is mounted on the engine, or within the engine cowling and it is not in the avionics bay.

Redundancy is achieved by the system having two independent channels (per engine) as well as an independent power supply. This eliminates any need for a backup manual control system.