As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: INOPERATIVE EPSU EMERGENCY POWER SUPPLY UNIT 10WL AT FWD GALLEY AREA. MAINTENANCE REPLACED EPSU EMERGENCY POWER SUPPLY UNIT (10WL) AT FWD GALLEY AREA I.A.W AMM33-51-38-000-001-A AND AMM 33-51-38-400-001-A.