As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR SHOWS ERRONEOUS RETURNS IN AUTO MODE. IT IS SHAPED LIKE A CRESCENT ON THE 2 TO 3 OCLOCK POSITION. NORMAL RETURNS IN MANUAL MODE. ACFT GROUNDED. PERFORMED WEATHER RADAR OPS TEST. NO DEFECTS NOTED. OPS CHECKED GOOD. INTERMITTENT FAULT IAW FIM 34-43 TASK 801. NO HISTORY LAST 30 DAYS.