As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF NR L/P:9473253 - SPEC NO.B777-33-3-6019 - EMERGENCY LT POWER SUPPLY M023 FND NO DC OUTPUT. REPLACED EMERGENCY LT POWER SUPPLY CHARGE ASSY AND OP TEST CARRI ED OUT FND NORMAL AS PER AMM 33-51-06-960-803 REV85. ADD EMP:V903172 IDT BY TA551.