As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EMERGENCY LIGHT BATTERY PACK LOW CAPACITY AT B ZONE M33096 REF HAECO NON-ROUTINE NO:9490756 - ORIGINATED BY EMP V905488,SPE C NO.B777-33-3-7015. PERFORMED BY EMP V909210,REPLACED THE BATTERY M33096 AND NEW BAT TERY PACK TEST FOUND NORMAL AS PER AMM 33-51-06-960-802 REV 101, WDM 33-51-64 REV 78.IDT BY TA591.