As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFER TO NRC LOG PAGE NO.: 9130369, B777-33-3-0018 CABIN RH DR4 EMERG PWR SUPPLY M33409 CHARGE CAP CHECK FOUND FAIL. RH DR4 EMERG PWR SUPPLY M33409 POWER SUPPLY CHARGER REPLACED AND OPERATIONAL TEST RESULT NORMAL IAW AMM 33-51-06. ADD EMP:V898173 INSPECTED BY HX102640.