As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFT LEFT EMERGENCY POWER SUPPLY UNIT HAS FAULT MESSAGE AND MULTILE EMERGENCY SEAT LIGHTS OUT THROUGH THE CABIN. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 11WL PER AMM 33-51-38 (AALA202302247877) AND SECURED A LOOSE CONNECTOR AT SEAT ROW 17/18. (AALA202302240359) A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY LIGHT SYSTEM WAS ACCOMPLISHED.