As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTINUOUS FIRE WARNING ON NR 3 ENGINE. UNABLE TO SILENCE FIRE WARN. BOTH EXTINGUISHER BOTTLES DISCHARGED WITH NO HELP. NR 3 ENGINE SHUT DOWN. RECEIVED WARNING APPROX 50 MIN INTO FLIGHT. ENG WINDMILLED FOR APPROX 5 MIN AFTER SHUTDOWN. FOUND LWR FIRE LOOP CONNECTOR SHORTED. REPLACED SAME, CKS GOOD.