As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY LIGHTING BATTTERY / EMERGENCY POWER SUPPLY UNIT 13WL AFT L CLASS 1 FAULT. MAINTENANCE REPALCED EMERGENCY POWER SUPPLY UNIT 13WL (AALA202212078277) AND BATTERY (AALA202212077150) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.