As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3906 THE CREW REPORTED AN ENGINE NR 1 FIRE DETECTOR FAIL MESSAGE. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED OPERATIONAL CHECK OF THE ENGINE FIRE DETECTOR SYSTEM IAW EMB 145 AMM 26-10-00 AND GENERAL VISUAL INSPECTION OF E1 FIRE DETECTOR IAW STANDARD MAINTENANCE PRACTICES AND ONE ENGINE START/STOP SEQUENCE. THE OPERATIONAL CHECK WAS GOOD NO DEFECTS NOTED. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.