As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING SB737-34-2687-NG-1-1 WEATHER RADAR MODIFICATION, WEATHER FAILED SYSTEM TEST, REF MM 34-43-00/5801, BOTH NAV DISPLAYS SHOW WXR ANTENNA FAIL. GROUNDED-YES. ANTENNA DRIVE UNIT REPLACED ON T/C SB737-34-2687--NG-1-1. GROUND VERIFICATION TEST PASSED, REF B737-900 AMM 34-43-00.