As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING THAT THE RADAR NOT WORKING IN AIR. IT SHOWED GROUND CLUTTER BUT NO RADAR RETURN WITH STORMS IN FRONT OF US. RADAR LOOKED PIXILATED LIKE IT WANTED TO GIVE A RETURN BUT ULTIMATELY DIDN'T GIVE ANY KIND OF RELIABLE RETURN.THE AIRCRAFT LANDED SAFELY AT DFW AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE REPLACED THE WEATHER RADAR TRANSCIEVER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 34-41-33.