As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3478 THE CREW REPORTED THE SERVICE DOOR EMERGENCY EXIT SIGN WAS FOUND TO BE BROKEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE SERVICE DOOR EMERGENCY EXIT LIGHTED SIGN ASSEMBLY IAW CRJ-700 AMM 33-51-05. THE OPERATIONAL TEST WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.