As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B777-33-3-7019 - R1 DR EMER LT POWER SUPPLY BATTERY PACK (M33094) CAPACITY CHECK FAIL. WORK TRANSFER NON ROUTINE WO.3341353. R1 DR EMER LT POWER SUPPLY BATTERY PACK(M33094) REPLACED AND INSTALLATION TEST CARRIED OUT WITH RESULT NORMAL AS PER AMM 33-51-06.