What was found
FLIGHT 4007 WAS IN CRUISE AT 22,000 AND WAS INFORMED OF SHOWERS IN THE FLIGHT PATH. THE WEATHER RADAR WAS NOT INDICATING ANY SHOWERS. THE CREW CALLED DISPATCH TO CONFIRM SHOWERS IN THE FLIGHT PATH, DISPATCH DID CONFIRM THE SHOWERS. FLIGHT 4007 THEN RETURNED TO PIT TO HAVE THE RADAR INSPECTED. MAINTENANCE INSPECTED AND REPLACED THE WEATHER RADAR IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL TESTS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.