As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1204, AFTER TAKEOFF, THE RADAR WAS SPOOKING AND WOULD NOT PAINT KNOWN BAD WEATHER . THE AIRCRAFT RETURNED, WHERE IT LANDED WITHOUT INCIDENT. POST FLIGHT INSP REVEALED THE RADAR ANTENNA AT FAULT. REMOVED AND REPLACED RADAR ANTENNA PERFORMED OPERATIONAL CHECKS GOOD. NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RETURNED TO SERVICE. (K)