As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR L3 EMERGENCY LIGHT BATTERY PACK M33400 FOUND CAPACITY LOW D URING DEEP CYCLE,REFER HAECO NON-ROUTINE LP:9459704,ORIGINATED B Y EMP V905359,SPEC NO.B777-33-3-7019. PERFORMED BY EMP V903672,REPLACED DOOR L3 PACK M33400 AND PERFOR MED OPERATIONAL TEST OF THE NEW BATTERY PACK THE RESULT WAS NORM AL PER AMM 33-51-06-960-802 REV 92.