As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6563 - IAD-RDU - DURING CLIMB, MADE AN UNSCHEDULED LANDING DUE TO RADAR FAILED ON CLIMB-OUT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE REMOVED AND REPLACED RADAR R/T UNIT, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)