As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, AFT LEFT EMERGENCY LIGHT EPSU (13WL) FAILS. SEVERAL LIGHT DO NOT ILLUMINATE; REF HAECO NR 440530-22560, REMOVED AND REPLACED 13WL ESPU IAW A320 AMM 33-51-38. SYSTEM OPS CKS GOOD. SUPPLEMENTAL INFORMATION TO FOLLOW.