As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EPSU BATTERY (13WL) FAILED. AS NOTED ON LTPR NR#5001187284-0010. EPSU BATTERY (13WL) FAILED ON OPERATIONAL CHECK OF THE EMERGENCY P/N OFF: AD3214-31 S/N OFF: 273852 QTY OFF: 1 EA POWER SUPPLY UNITS BY BITE-CHECK AND REQUIRED REPLACEMENT. P/N ON: AD3214-31 S/N ON: 231764 QTY ON: 1 EA BATTERY REPLACEMENT ON (13WL) PERFORMED IAW AMM: 33-51-38/401 WORK ACCOMPLISHED BY 5H0545 AND INSPECTED BY 5H0763. REV. 117 TEST SATISFACTORY.