As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O SIDE WEATHER RADAR APPEARS TO POINT DOWN EXCESSIVELY SHOWING EXTREME GROUND CLUTTER, WHEN IN AUTO MODE. GROUNDED - YES. ACCOMPLISHED WXR BITE REF B737-800 FIM 34-43 TASK 801. UNABLE TO DUPLICATE DEFECT. PRECAUTIONARY REPLACED WXR TRANSCEIVER REF B737-800 AMM 34-43-41. OPS NORMAL.