As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLIGHT 2415 ON APPROACH, RECEIVED A FIRE SYSTEM FAULT MESSAGE. NOTICED CIRCUIT BREAKER N1 POPPED. MAINTENANCE RESET THE CIRCUIT BREAKER AND PERFORMED OPERATIONAL CHECK OF THE SYSTEM. NO FAULTS FOUND. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.