As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON BOARD WEATHER RADAR INDICATES/SHOWS NON EXISTENT WEATHER/RADAR RETURNS ON BOTH THE LEFT AND RIGHT ND FROM THE 1 O'CLOCK POSITION TO THE 3 O'CLOCK IN MANUAL MODE. RADAR TILT ADJUSTMENTS SHOW GROUND CLUTTER ONLY IN THIS AREA FIRST. UPON TILTING DOWN. GROUNDED - YES. REPLACED ANTENNA DRIVE UNIT AND PLATE WX RADAR OPS NORMAL REF B737-800 AMM 34-43-00.