As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF IN MIAMI, RECEIVED FIRE WARNING INDICATION ON NR 1 ENGINE. SHUT DOWN ENGINE AND RETURNED TO MIAMI. LANDED WITHOUT INCIDENT. INSPECTION REVEALED A CHAFED SENSOR LOOP ON THE AFT OUTBOARD COWLING DOOR. REPLACED SENSOR LOOP, PERFORMED OVERWEIGHT LANDING INSPECTION. AIRCRAFT RETURNED TO SERVICE. (M)