As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT AT SFO RIGHT BRAKE APPEARED TO BE DRAGGING. ON RETURN TAXI TO FBO GROUND CONTROL REPORTED SMOKE FROM THE BRAKE AREA. AIRCRAFT WAS STOPPED AND ON INSPECTION NRB 4 FUSE PLUG HAD ACTIVATED. REMOVED/REPLACED THE NR 3 AND 4 WHEEL TIRE ASSY AS PER THE CE750 AMM 32-41-02. REMOVED/REPLACED THE NR 4 BRAKE ASSY AS PER THE CE750 AMM 32-42-01.