As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3990 DURING THE DESCENT THE CREW REPORTED, RECEIVED A FLAP FAIL AND SPS ADVANCE MESSAGES. THE CREW RAN THE APPROPRIATE CHECKLIST. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE FLAP ELECTRICAL CONTROL UNIT IAW EMB-145 AMM 27-53-02. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.