As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM RAP TO FSD ON FLIGHT NUMBER 7584: RADAR FAILED AFTER TAKEOFF. SEVERE WEATHER EN ROUTE. PILOTS ELECTED TO RETURN TO RAP. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED RADAR RT. AIRCRAFT RETURNED TO SERVICE.