As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF NR L/P 9469641 - SPEC NO. B777-33-3-7019 - DURING EMER PWR PACK CAPACITY CHK FOUND DR 2L FWD M33096 BATTERY LOW VOLTAGE. EMER PWR PACK ON DR 2L FWD M33096 REPLACED, NEW BATTERY INSTALLA TION TEST CARRIED OUT FOUND NORMAL REF AMM 33-51-06-960-802 REV. 84 ADD EMP:V903182 IDT BY TA646