What was found
DURING TAXI-OUT, APPLICATION OF THE RIGHT BRAKE CAUSED SEVERE, ERRATIC SHAKING AND VIBRATION THROUGHOUT THE AIRCRAFT. CONDITION WAS PARTICULARLY NOTICEABLE DURING RIGHT TURNS WHEN DIFFERENTIAL BRAKING WAS APPLIED TO ASSIST WITH TURNING. SHAKING WAS ABRUPT AND EXCESSIVE DURING RIGHT BRAKE APPLICATION. NO CAS MESSAGE WAS DISPLAYED. CW INSPECTION OF LANDING GEAR AND BRAKES ASSY EVERYTHING LOOKS OK. CW ALL RECOMMENDATIONS VIEWING CMC FOR LANDING GEAR SYSTEMS EVERYTHING THE GREEN AND NOTHING FAILED. CW BLEEDING THE BRAKES AND TAXI CHECK OPS CHECK GOOD IAW EMB 300 AMM 32-40-00