As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 179 (ONT-LAS) FALSE FIRE WARNING-ON DESCENT INTO LAS, CREW REPORTED SMOKE/CARGO FAULT. AFTER FIRE SUPPRESSANT DISCHARGE, RECEIVED LAV/GALLEY DETECTION FAULT. MAINTENANCE REMOVED AND REPLACED THE SMOKE DETECTOR CONTROL UNIT, SMOKE DETECTORS 3WH & 4WH AND FIRE EXTINGUISHER BOTTLE. OPERATIONAL CHECK WAS GOOD. (A)