As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE NR 4 ENGINE FIRE WARNING CAME ON. SHUT DOWN ENGINE AND FIRE WARNING CONTINUED. DISCHARGED FIRE EXTINGUISHER AND FIRE WARNING CEASED. GROUND INSPECTION REVEALED NO EVIDENCE OF FIRE. FOUND DETECTION ELEMENT DEFECTIVE ON LOWER ELEMENT ASSY. REPLACED ELEMENT ASSY AND CHECKED PNEUMATIC LINES FOR SECURITY. RAN ENGINE AND CHECKED OK. AIRCRAFT RETURNED TO SERVICE. (M)