What was found
FLT 1537 MCO-CLT - BRAKE FAILURE - BRAKES FAILED AFTER LANDING DURING ROLLOUT AT APPROX 90 KTS. CYCLED ANTI-SKID SWITCH OFF FOR ALTERNATE BRAKES WHICH WORKED FINE. TURNED ANTI-SKID SWITCH ON FOR STEERING, WHICH ALSO WORKED, AND NORMAL BRAKES OPERATED ON TAXI IN. MAINTENANCE REPLACED BRAKE SELECTOR VALVE 23GG IAW AIRBUS MAINTENANCE MANUAL 32-42-11-400-001, REPLACED BENT 4 MLG TACHOMETER SHAFT IAW AMM 32-42-57, AND REPLACED BRAKE STEERING CONTROL UNIT (BSCU) IAW AMM 32-42-34.