As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1255, FLL-GYE. (AIRCRAFT PERFORMED AN AIR TURN BACK TO FLL) 'DURING CRUISE FLIGHT ON ND DISPLAY. -AMBER "WX WEAK" -RED "R/T FAULT" -TURNED RADAR OFF THEN ON OPERATED NORMALLY FOR 30 MINS THEN R/T FAULT; FOUND RADAR DRIVE UNIT AT FAULT. REMOVED AND REPLACED IAW MM 34-41-11, OPS CHECK GOOD.'