As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT WHILE MAKING A 90 DEGREE RIGHT TURN, THE RIGHT MAIN TIRE/BRAKE FELT LIKE IT WAS SKIDDING. AFTER DECIDING TO RETURN TO THE RAMP, PROBLEM PERSISTED ANYTIME ANY AMOUNT OF RIGHT BRAKE PRESSURE WAS APPLIED. REPLACED LT BRAKE ASSY. OPS CHECK GOOD. IAW MM 32-45-21.