As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LINE CHECK, MAINTENANCE FOUND THAT THE AFT EMERGENCY OVERWING EXIT SIGNS ON BOTH THE LEFT AND RIGHT SIDES WERE INOPERATIVE. MAINTENANCE REPLACED THE POWER SUPPLY (B5-25) AND OPERATIONALLY CHECKED THE SYSTEM. THE AIRCRAFT RETURNED TO SERVICE.