As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT THEY HAD INTERMITTENT RADAR FAULT ANNUNCIATIONS FOLLOWED BY RADAR THUMPING NOISE. TROUBLESHOOTING DETERMINED THE WEATHER RADAR PN 622-8440-003, SN 3680 WAS DEFECTIVE. THE RADAR UNIT WAS REPLACED WITH A REPAIRED UNIT.