As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6357 - IAD-RDU - DURING CRUISE, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO RADAR FAILURE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED RADAR RT, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)