What was found
WHILE ON TAXI OUT IN DFW, LT BRAKES FAILED DUE TO BROKEN ARM AT BRAKE CONTROL VALVE. MAINTENANCE REMOVED AND REPLACED THE BRAKE CONTROL VALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE ON TAXI OUT IN DFW, LT BRAKES FAILED DUE TO BROKEN ARM AT BRAKE CONTROL VALVE. MAINTENANCE REMOVED AND REPLACED THE BRAKE CONTROL VALVE.