Full Authority Digital Engine Control (FADEC) units are commonly installed on gas turbine engines. The aim of FADEC computer controls the engines by reading all input and output parameters of engines themselves and the required performance requested by flight crew. It controls the engine to run efficiently with full control of the system. It also reduces pilot workload by making the engine control and monitoring much easier.

Since the authority of FADEC is very extensive, losing the correct operation may cause loss of engine control, therefore to ensure sufficient redundancy, each engine is normally equipped with two FADEC computers, and two of any essential components or sensors, with one channel always active and a second one on standby. If one channel fails, the other automatically takes control and performs the exact same functions. As a result, the engines will continue to operate normally should a single component from one of the FADEC systems fail in flight. Therefore, FADEC engines are "single-fault tolerant".