As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/GSO - FLT 6321 - DURING CLIMB AT 1045 HOURS ON 4-18-97, MADE AN UNSCHEDULED LANDING DUE TO NR 1 VOR FAILED. AIRCRAFT WENT TO GATE AT IAD WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 1 NAV RT, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)