As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE PREFLIGHT FOR FLIGHT 4128 THE CREW REPORTED THE EMERGENCY EXIT SIGN ABOVE THE SERVICE DOOR WAS NOT ATTACHED OR FELL OFF THE BRACKET. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE EMERGENCY SIGN ABOVE THE SERVICE DOOR IAW CRJ-700 MM 33-51-05. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.