As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B777-33-3-7015 - M33099 EMERGENCY LT BAT PACK BATTERY CAPACITY FAILED - TRANSFER REFER NON-ROUTINE WO.3168930 AND INSPECTED BY. EMER LT BATTERY REPLACED AND TESTED NORMAL I.A.W AMM 33-51-06 - WORK ACCOMPLISHED BY MECH AND INSPECTED BY IDT INSPECTED OKAY.