What indications would suggest a FADEC fault?

• A. Cockpit nuisance lighting only.
• B. Normal ECAM messages with stable engine performance.
• C. Warnings on ECAM/ECU, degraded engine performance, abnormal N1/N2 behavior, or loss of automated control.
• D. No engine indicators change.

Answer: (C)

FADEC faults show up as warnings and real changes in how the engine behaves, not as harmless or unseen issues. When the FADEC or its sensors detect a problem, the system typically flags warnings on ECAM/ECU and you’ll see the engine respond in abnormal ways.

Specifically, you’d expect to see one or more of these: ECAM/ECU warnings indicating a FADEC issue, degraded engine performance such as reduced or unstable thrust, abnormal N1 or N2 behavior (speeds not following the commanded schedule or behaving erratically), or a loss of automated control where the FADEC can no longer manage the engine thrust automatically. These signs point to the brain of the engine having trouble and the control system stepping in to protect the engine.

If you only had cockpit nuisance lighting, with no ECAM warnings and the engine performing normally, that wouldn’t constitute a FADEC fault. Likewise, normal ECAM messages with stable performance imply the FADEC is functioning, and no change in engine indicators means there’s no fault to address.