As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND THE NR 1 EMERGENCY LIGHT BATTERY ASSEMBLY NEEDED TO BE REPLACED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 1 EMERGENCY LIGHT BATTERY ASSEMBLY IAW MNTCWC#33-700-19. THE AIRCRAFT WAS RETURNED TO SERVICE.