As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4507, FLIGHT ATTENDANT REPORTED EMERGENCY LIGHTS AND SIGNS NOT WORKING. AIRCRAFT REMOVED FROM SERVICE. FOUND LEFT OVERWING EMERGENCY LIGHT SOCKET DIRTY. CLEANED IAW CMM 33-52-06. PERFORMED OPERATIONAL CHECK OF EMERGENCY LIGHTS IAW AMM 33-51-00. NO DEFECTS NOTED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.