What was found
ON LANDING FIRST OFFICER`S BRAKE PEDAL WENT TO FLOOR. NO BRAKE ON RT SIDE. CAPTAIN`S BRAKES WORKED OKAY ON BOTH PEDALS. BRAKE ANTI-SKID SWITCH WAS QUICKLY MOVED FROM NORMAL ON TO ALTN ON AFTER FIRST OFFICER SAID HE HAD NO BRAKES ON RT PEDAL. ALL HYD NORMAL SUSPECT ANTI-SKID FAILURE SIGNAL ON RT MAIN. TROUBLE SHOT IAW TSM 32-42-00 PERFORMED BITE ON BSCU. FOUND FAULT CODE 022 RT MASTER VLV 90GG. REPLACED RT MASTER VLV IAW MM 32-42-19, OPERATIONS CHECKED GOOD. PERFORMED LOW PRESS HYD RESERVOIR 4300 INSPECTION CHECK IAW MM 32-43-11-06 PISTON END IS BETWEEN RED & GREEN BAND.