As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF NR L/P:9469743 - SPEC NO.B777-33-3-7019 -ZONE C AFT LH AISLE CEILING AREA EMERGENCY LIGHT FND LOW CAPACITY. DOOR LH NO.4 BATTERY M33407 REPLACED AND OPERATIONAL TEST FND NORMAL AS PER AMM 33-51-06-960-803 REV.84. ADD EMP:V905404 IDT BY TA289.