As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR DISPLAY DOES NOT SHOW EVEN RETURNS THIN ELONGATED SPIKES RANDOMLY APPEAR IN ALL QUADRANTS. ACFT GROUNDED. REPLACED WEATHER RADAR DRIVE UNIT AMM 34-43-11 AND WXR FLAT PLATE AMM 34-43-11. OPS CHECKED WXR AMM 34-43-00 ALL GROUND FUNCTIONAL TESTS PASS.