As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: REFERENCE LP320750. AIRCRAFT WAS NOT GROUNDED WAS FOR OVERNIGHT SCHEDULED MX. EPSU 13WL AFT LT FAILED CIDS/EPSU TEST CORRECTIVE ACTION: REMOVED AND INSTALLED NEW EPSU 13WL BATTERY, OPS CK GOOD. IAW A320 AMM 33-51-38-400-002-A/END/