As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTED A WEATHER RADAR ANTENNA RED MESSAGE ON THE RADAR DISPLAY. RADAR RETURNS DISAPPEARED AND A GRINDING NOISE WAS HEARD AND FELT IN THE VICINTY OF THE NOSE. THE AIRCRAFT LANDED SAFELY AT CLT AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE REPLACED THE WEATHER RADAR ANTENNA DRIVE ASSEMBLY 7SQ PER AMM 34-41-11. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.