What was found
DURING DESCENT, THE CAPTAIN REPORTED LOSING THE TRANSPONDER, RADIO MANAGEMENT UNITS 1 AND 2, FLIGHT MANAGEMENT SYSTEM, TCAS, AUTOMATIC DIRECTION FINDER, AND LOCALIZERS. WHEN THE AIRCRAFT LANDED IN PIT, MAINTENANCE INSPECTED AND REPLACED THE NR 1 RADIO MANAGEMENT UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 31-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.