As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 3320 - THE CREW REPORTED THEY HAD A NR 1 ENGINE FIRE WARNING IN FLIGHT. THE AIRCRAFT RETURNED TO CLEVELAND WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NR 1 ENGINE AFT FIRE LOOP IAW BEECHCRAFT 1900D MM 26-10-00. THE AIRCRAFT WAS RELEASED FOR SERVICE. (M)