As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RH DOOR 4 MAIN AISLE EMERGENCY LIGHT CAN NOT STAY ON 15 MINUTES REF HAECO NON-ROUTINE NO.9490060,ORIGINATED BY EMP V903194,SPEC NO.B777-33-3-7019. PERFORMED BY EMP V905356,REPLACED THE M33409 BATTERY AND INSTALL ATION TEST FOUND RESULT "NORMAL" REF AMM 33-51-06-960-803 REV95, IDT BY TA407.