As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEATHER RADAR FAILED DURING FLIGHT. AN EMERGENCY WAS DECLARED, RETURNED TO DEPARTURE, AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS GROUNDED. ACCOMPLISHED TROUBLESHOOTING IAW FIM 34-43-00, FOUND THE WEATHER RADAR PANEL AND ANTENNA AT FAULT. REPLACED IAW MM 34-43-2 AND MM 34-43-05. TESTED OKAY, NO FAULTS NOTED.