What was found
AIRCRAFT IN BASE MAINTENANCE: RIGHT HAND NUMBER 3 OVERWING DOOR BACKUP BATTERY WILL NOT CHARGE. REPLACED RIGHT HAND MUMBER 3 OVERWING DOOR BACKUP BATTERY. PERFORMED OPERATIONAL CHECK GOOD. PER B777-300 AMM 52-12-19.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT IN BASE MAINTENANCE: RIGHT HAND NUMBER 3 OVERWING DOOR BACKUP BATTERY WILL NOT CHARGE. REPLACED RIGHT HAND MUMBER 3 OVERWING DOOR BACKUP BATTERY. PERFORMED OPERATIONAL CHECK GOOD. PER B777-300 AMM 52-12-19.