What was found
FLT 1234 - MQT-MKE - DURING THE CLIMB-OUT, THE CREW TURNED ON THE RADAR AND FOUND IT TO BE INOPERATIVE. DECIDED TO RETURN TO MQT DUE TO BAD WEATHER EN ROUTE TO MKE. MADE AN UNEVENTFUL LANDING. ONCE ON THE GROUND, MAINTENANCE TROUBLESHOT THE SYSTEM. REPLACED THE RADAR UNIT, OPERATIONALLY CHECKED GOOD, AND THE A/C WAS RETURNED TO SERVICE. (M)