As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: DONT PASS OPERATIONAL TEST EMERGENCY POWER SUPPLY UNIT ASSEMBLY FORWARD AREA (1EA) AND AFT AREA IN PASSENGER CABIN (1EA). REPLACED OF THE EMERGENCY POWER SUPPLY UNIT 10WL AND BATTERY (AALA202009089028) PER AMM 33-51-38-400-001-A AND AMM 33-51-38-400-002-A.