As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND DOOR L5 EMERGENCY LIGHT BATTERY PACK (M33407) LOW CAPACITY (LESS THAN 15 MINUTES) REF TO HAECO NON-ROUTINE NO.9451990, ORI GINATED BY EMP V905400, SPEC NO.B777-33-3-7019. PERFORMED BY EMP V905393 AND IDT BY EMP V907748 - REPLACED THE B ATTERY PACK M33407 & PERFORMED THE TEST OF THE BATTERY PACK. THE RESULT WAS NORMAL IAW AMM 33-51-06-960-802 REV 97.