Where is FADEC located?

• A. Mounted on each engine
• B. In the cockpit central console
• C. In the wing root
• D. In the auxiliary power unit

Answer: (A)

FADEC stands for Full Authority Digital Engine Control. It is the engine’s digital brain that fully manages fuel metering, ignition, and other engine functions. To respond quickly and reliably to each engine’s conditions, each engine has its own FADEC unit, typically mounted on the engine itself near the accessory gearbox. This per-engine placement minimizes wiring length, reduces latency, and keeps control isolated to each engine, which improves reliability and fault tolerance. It’s not in the cockpit, not in the wing root, and not in the auxiliary power unit, because those locations would add latency and create unnecessary shared points of failure. So FADEC is mounted on each engine.