As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EPSU BATTERY (10WL) FAILED. AS NOTED ON LTPR NR#5001187284-0010. EPSU BAATTERY(10WL) FAILED ON OPERATIONAL CHECK OF THE P/N OFF: AD3214-31, S/N OFF:261416, QTY OFF:1 EA EMERGENCY POWER SUPPLY UNITS BY BITE-CHECK AND P/N ON: AD3214-31, S/N ON:242253, QTY ON:1 EA. WORK RECORDED ON REQUIRED REPLACEMENT. BATTERY REPLACEMENT ON (10WL) LTPR NR#5001187284-0010. WORK ACCOMPLISHED BY 5H0545 AND PERFORMED IAW AMM: 33-51-38/401 REV. 177. TEST SATISFACTORY. INSPECTED BY 5H0763.