As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C WAS TAXIING FROM IAH GATE WHEN CREW FELT THE BRAKES DRAGGING. UPON FURTHER INSPECTION FOUND THE RT INBOARD BRAKE DRAGGING. MAINTENANCE REMOVED AND REPLACED THE BRAKE CONTROL VALVE AND OPS CHECK GOOD LP(2818684). ACFT WAS RELEASED TO SERVICE.