What is FADEC and what overhaul steps are performed on a FADEC system?

• A. Full Authority Digital Engine Control; steps include software calibration, electrical tests, harness inspection, sensor/actuator verification, and power supply checks.
• B. Functional Automated Electronic Controller.
• C. Fuel air engine diagnostic control.
• D. Final adjustment and calibration engine circuit.

Answer: (A)

FADEC stands for Full Authority Digital Engine Control, a digital engine-management system that takes over almost all control of fuel scheduling, ignition timing, and related functions to optimize performance and protection. In an overhaul, the steps center on bringing the entire FADEC chain back to spec: software calibration or updating the engine maps so the controller commands the right fuel and timing; electrical tests to verify circuit integrity and proper signaling; inspecting the wiring harness for wear, chafing, and connection reliability; verifying sensors and actuators—ensuring sensors provide accurate data and actuators respond correctly to FADEC commands; and power supply checks to confirm clean, stable power and proper failure-backup behavior. These steps reflect how FADEC integrates software, electronics, and hardware to manage the engine, which is why this option is the best match. Other descriptions do not align with the actual acronym or the typical overhaul tasks performed on a FADEC system.