As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEATHER RADAR FAILED. SCREEN DEPICTED ALL RED ON ALL SCALES & DID NOT DEPICT OBVIOUS WEATHER. THE FLIGHT DECLARED AN EMER & RETURNED TO FIELD WITHOUT FURTHER INCIDENT. ACFT WAS REMOVED FROM SERVICE. REPLACED WEATHER RADAR TRANSCEIVER M00213 IAW 34-43-01 & OPERATES NORMAL IAW AMM 34-43-00.