As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT THE EMERGENCY POWER SUPPLY WILL NOT TEST. MAINTENANCE INSPECTED AND REPLACED THE FORWARD SUPPLY, FERRIED THE AIRCRAFT TO CVG AND REPLACED THE AFT SUPPLY IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-00-00. OPERATIONAL TESTS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.