As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: AC WAS ON SCHEDULED MAINTENANCE FOR THIS EVENT. REFERENCE LP497437 ITEM 2, DURING COMPLETION OF T/C HS2010-01, EPSU TEST.FAIL. CORRECTIVE ACTION: REMOVED AND REPLACED EPSU UNIT 12WL REF AMM 33-51-38-000-001-A AND AMM 33-51-38-400-001-A. EPSU TEST GOOD. /END/