As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROW FOUR EMERGENCY FLOOR LIGHTING WAS NOTED TO BE INOPERATIVE DURING THE PREFLIGHT INSPECTION. MAINTENANCE INSPECTED AND REPLACED THE EMERGENCY POWER SUPPLY UNIT AT THE 5LK POSITION, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-51-00. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.