As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRK FAIL YELLOW CAS: YELLOW BRAKE FAIL CAS MESSAGE APPEARED AFTER ENTERING A RUNWAY FOR TAKEOFF. BRAKES STARTING GRABBING THEN FAILED. I SLOWLY TAXIED OFF OF THE RUNWAY TO THE CLOSE BY TAXIWAY AND USED THE EMERGENCY BRAKE TO STOP CORRECTIVE ACTION: REMOVED AND REPLACED BRAKE CONTROL MODULE IAW PHENOM 300 AMM 32-40-07. OPS CHECK GOOD NO CAS MESSAGE NOTED