As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ECU LIGHT AND AUDIO FOR NR 1 ENGINE CAME ON IN FLIGHT. PILOT FOLLWED PROCEDURES CHECKLIST. TRANSITIONED NR 1 FADEC TO MANUAL MODE. LANDED WITHOUT FURTHER PROBLEMS. MECHANIC FOUND NR1 ENGINE N1 FAULT CODE CAUSED LIGHT TO ILLUMINATE. MECHANIC FOLLOWED FAULT ISOLATION MANUAL. WIRING AND CONNECTIONS WERE CHECKED AND FAULTS WERE CLEARED. AIRCRAFT WAS GROUND RUN AND FLOWN WITH NO FURTHER FAULTS. CAUSE OF PROBLEM NOT KNOWN.