As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, PILOT HAD A MOMENTARY "FIRE DETECTION" LIGHT ON FORWARD PANEL WITH MOMENTARY AURAL WARNING. ACCOMPLISHED COM PROCEDURE AND FOUND "B" LOOP FAILED TEST. FLIGHT CONTINUED ON AND LANDING WAS UNEVENTFUL. MAINTENANCE INTERCHANGED FIRE DETECTOR CARDS PER FIM. OPERATIONAL CHECKED GOOD, AND AIRCRAFT RETURNED TO SERVICE.