As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DID NOT PASS OPERATIONAL TEST EMERGENCY POWER SUPPLY UNIT AT FORWARD GALLEY AREA 10WL (1 EA). REPLACED EMERGENCY POWER SUPPLY UNIT AT FORWARD GALLEY AREA 10WL PER AMM 33-51-38-400-001-A AND PERFORMED OPERATIONAL TEST PER AMM 33-51-00-710-001-A.