As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EFD - DURING LINE CHECK INSPECTION, THE FORWARD AND AFT AISLE PATH EMERGENY LIGHTS WERE FOUND INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE AFFECTED EMERGENCY LIGHT BATTERY PACKS IAW ATR 42-500 JIC 33-51-21, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (X)