As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING S/C FOUND MULTIPLE EMERGENCY LIGHTS OUT AFT CABIN LT SIDE SEATS. FOUND EPSU 13WL WITH UNIT FAULT LIGHT ON. WHILE T/S SWAPPED WITH EPSU 10WL. NOW BOTH BAD, REINSTALLED TO ORIG LOC. FOUND WIRES SHORTED AT SEAT 34ABC. REINSTALLED WIRES INTO CONNECTOR REF A321 WDM 33-51-08(458894) REMOVED AND REPLACED EPSU 13WL AND 10WL PER A321 AMM 33-51 OPS CK GOOD. (LP# 7981275)