What was found
DURING CRUISE FLIGHT, A NUMBER ONE RADIO MANAGEMENT UNIT FAIL WARNING MESSAGE ILLUMINATED. THE CREW UTILIZED THE NUMBER TWO RADIO MANAGEMENT UNIT, AND CONTINUED ON TO AZO. THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NUMBER TWO RADIO MANAGEMENT UNIT, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 23-11-00. OPERATIONAL CHECKS WERE COMPLETED AND THE AIRCRAFT WAS RETURNED TO SERVICE.