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 EMERGENCY NR 4 BATTERY AND BATTERY CHARGER NEEDS TO BE REPLACED IAW WC 33-700-19. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE EMERGENCY NR 4 BATTERY AND BATTERY CHARGER IAW MTX WC #33-700-19. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.