As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR AUTO MODE, FALSE RETURNS FM 80-200 NM. MANUAL MODE ONE DEGREE UP FOR ACCURATE WEATHER RETURNS. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT, WEATHER RADAR GROUND VERIFICATION TEST PASSED IAW AMM 34-43-00. LONG RANGE DISPLAY AND FUNCTIONS WHEN COMPARED WITH ANOTHER AIRCRAFT, RETURN TARGETS ARE SIMILAR IN AUTO AND MANUAL MODES.