As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG - FLIGHT 2353 - CREW REPORTS THAT WHEN CHECKING THE ADVISORY LIGHTS, THE FIRE DETECTION BELL SOUNDS. MAINTENANCE INSPECTED THE AIRCRAFT SYSTEMS AND AFTER TROUBLESHOOTING FOUND THE NR 1 ENGINE FIRE DETECTOR LOOP -A- CONNECTOR BAD. THE CONNECTOR WAS REPLACED, OPERATIONAL CHECKS WERE PERFORMED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.