As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHV-DURING MAINTENANCE CHECK, MAINTENANCE FOUND THE AFT LOWER LEFT AND RIGHT EMERGENCY EXIT DOOR LIGHTS WILL NOT ILLUMINATE. MAINTENANECE REMOVED AND REPLACED EMERGENCY POWER SUPPLY 30WL IAW ATR AMM/JIC 33-51-21 AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.