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. ACCOMPLISHED TROUBLESHOOTING IAW FIM 34-43-00, FOUND WEATHER RADAR PANEL AND ANTENNA AT FAULT. AN EMERGENCY WAS DECLARED, RETURNED TO DEPARTURE, AND AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS GROUNDED. REPLACED IAW MM 34-43-2, AND MM 34-43-05. TESTED OKAY, NO FAULTS NOTED.