As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRANSIT CK FOUND AISLE 26 & 27 WALKWAY EMER LIGHT OUT.T/S PER A321 TSM 33-51 AND PERFORMED BITE CHK OF EPSU & FOUND EPSU (12WL) EXT R UNIT FAULT. R/R EPSU (12WL) PER A321 AMM 33-51 & PERFORMED OP CK OF EPSU PER A321 AMM 33-51-00-710-001-1 WITH NO FAULTS. (LP# 9554330)