As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPORT TASK: DR L4 EMER PWR SUPPLY (M33407) BATT FUNCTIONAL FAI L TRANSFER REF HX NON-ROUTINE WO.764220 AND ORIGINATED BY V92059 1 DR L4 EMER PWR SUPPLY (M33407) BATTERY REPLACED & TEST OKAY IAW AMM 33-51-06 WORK ACCOMPLISHED BY MECHANIC V920591 INSPECTED BY V920585 INSPECTED BY HX161779, APPROVED.