As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFT GALLEY EMERGENCY LIGHT POWER SUPPLY UNIT FAULT NO EMERGENCY LIGHT IN AFT GALLEY. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 13WL (AALA202404041891) AND BATTERY (AALA202404044664). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.