As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7799 ENROUTE GEG - EAT/AIR TURNBACK DISCREPANCY: APPROXIMATELY 10 MINUTES AFTER DEPARTURE, WHILE LEVEL IN CRUISE FLIGHT, THE ENGINE FIRE ANNUNCIATOR LIGHT AND WARNING HORN ACTIVATED IN FLIGHT. PILOT DECLARED AN EMERGENCY AND RETURNED TO GEG. LANDED WITHOUT FURTHER INCIDENT. CORRECTIVE ACTION: MAINTENANCE REPLACED A FIRE LOOP. OPS CHECK GOOD.