As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EPSU BATTERY (12WL) TEST FAILED; BATTERY NEEDS TO BE REPLACE. AS NOTED ON LTPR NR#5001235876-0010. EPSU BATTERY (12WL) FAILED ON EMERGENCY LIGHTING BATTERY P/N ON: AD3214-31 S/N ON:284086 QTY:1EA. CAPACITY TEST AND REQUIRE REPLACEMENT. BATTERY REPLACEMENT OF (12WL) PERFORMED IAW AMM:33-51-38-400-002 REV.119 TEST SATISFACTORY. P/N OFF:AD-3214-31 S/N OFF:282997 QTY:1EA