As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FO RADAR IN WXTT WOULD PAINT NON EXISTENT RETURNS THAT WOULD SHOW AS RADAR VERTICAL STRIPES ON RADAR. CPT'S WORKED FINE. GROUNDED - YES. ACCOMPLISHED WEATHER RADAR SYSTEM OPERATIONAL TEST. TEST PASS. ALL OPS NML. REF B737-900 AMM 34-43-00.