What was found
MAIN BATTERY CHARGER MESSAGE APPEARED ON EICAS. A/C RETURNED TO JFK. REPLACED MAIN BATTERY AND CHARGER. ETOPS CATEGORY ''B'': DIVERSION OR TURNBACK
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MAIN BATTERY CHARGER MESSAGE APPEARED ON EICAS. A/C RETURNED TO JFK. REPLACED MAIN BATTERY AND CHARGER. ETOPS CATEGORY ''B'': DIVERSION OR TURNBACK