As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT 12WL DOESNT WORK CORRECTLY INCLUDING BATTERY IN PASSENGER CABIN. REPLACED EMERGENCY POWER SUPPLY UNIT 12WL (AALA202409100500) AND BATTERY (AALA202409107420) IN PASSENGER CABIN PER AMM 33-51-38-000-001-A.