As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA - DURING MAINTENANCE INSPECTION THE NUMBER TWO EMERGENCY LIGHT BATTERY WAS FOUND TO BE NOT HOLDING A CHARGE. MAINTENANCE REMOVED AND REPLACED THE AFFECTED BATTERY PACK, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.