As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B777-33-3-7019 DR 2 LH EMER LT BATTERY PACKS TEST FAIL. TRANSFER REF. NON-ROUTINE WO.1097710 AND ORIGINATED BY EMP V902113. DR L2 EMER LT BATTERY PACK M33099 REPLACED AND TESTED NORMAL AS PER AMM 33-51-06. WORK ACCOMPLISHED BY MECHANIC V898181 AND INSPECTED BY V896958.