As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAE - DURING DESCENT, NR 4 ENGINE FIRE WARING CAME ON AT 0403Z, SHUT DOWN ENGINE AND DISCHARGED HRD. REMOVED AND REPLACED BROKEN FIRE WARNING LOOP WIRE ON LEFT SIDE OF NR 4 ENGINE. INSPECTED ENGINE AND FOUND NO EVIDENCE OF ACTUAL FIRE. REMOVED AND REPLACED HRD FIRE BOTTLE. (M)