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 EMERGENCY POWER SUPPLY UNIT 10WL IN PASSENGER CABIN (1EA). REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT 10WL SERIAL NUMBER 3323 IN PASSENGER CABIN WITH SERIAL NUMBER 2308. EMERGENCY POWER SUPPLY UNIT SERIAL NUMBER 2308 WAS BAD FROM STOCK. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT 10WL SERIAL NUMBER 2308 (AALA202112014036) IN PASSENGER CABIN.