As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT ENGINE SHUT DOWN, DECLARED EMERGENCY, AIR TURNBACK. NR 1 ENGINE FIRE WARNING LIGHT ILLUMINATED. ACCOMPLISHED FIRE PROCEDURE PER QRH, FIRED BOTH EXTINGUISHER BOTTLES. INSPECTED ENGINE FOR EVIDENCE OF FIRE, NONE NOTED. VERIFIED OVERHEAT SYSTEM NORMAL. REMOVED AND REPLACED NR 1 ENG LOWER FIRE LOOP AND 4 CONNECTORS PER MM.