As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN AUTO MODE WEATHER RADAR DISPLAYS ANOMALOUS RETURNS AT 930 AND 230 POSITIONS 2.5 MILES. ANOMALIES ARE NOT PRESENT IN THE MANUAL MODE. ACFT GROUNDED. CLEANED DUST FROM R/T, COOLING DUCT, AND FAN REF MM FIM 34-43 TASK 805. PERFORMED WXR SYS OPS TEST REF TASK 34-43-00-710-802-001. OPS CK NORMAL, NO ANOMALIES NOTED, NO HISTORY 90 DAYS.