As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WX RADAR APPEARS TO BE BIASED LOW TO THE RIGHT SIDE. PAINTS GROUND RETURNS ON RIGHT BUT NOT SIGNIFICANTLY(FL410) WITHIN 40 NM AND VISIBLE TO THE NAKED EYE. PERFORMED OPERATIONAL TEST OF WEATHER RADAR SYSTEM IAW AMM 34-43-00-715, FOUND NO DEFECT AT THIS TIME.