As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3979 THE CREW REPORTED THE EXIT SIGN WAS LOOSE. THE AIRCRAFT WAS REMOVED FROM SERVICE. RE-SECURED EXIT SIGN. THE OPERATIONAL CHECK OF THE EMERGENCY LIGHTS WAS GOOD IAW EMB 145 AMM 33-50-00. NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.