As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B777-33-3-7019 DR R3 EMERGENCY LIGHT POWER SUPPLY M33401 BATTERY PACK CAPACITY CHECK FAIL. DR R3 EMERGENCY LIGHT POWER SUPPLY M33401 BATTERY PACK AND CHARGER REPLACED AND TESTED NORMAL, AS PER AMM 33-51-06. ATTACHED FORM 44-0008 ITEM 1 TO 2 ACCOMPLISHED.