As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, HAD A DEICE PRESS HI/LO CAS ACCOMPANIED BY A YAW TO THE RIGHT. OCCURED PRIOR TO 80 KIAS WITH T/O POWER SET, TAKEOFF WAS ABORTED. DURING A RUN UP AFTER THE ABORTED T/O IT WAS DISCOVERED THAT THE RUDDER BIAS WAS WORKING WHEN SELECTED OFF. TROUBLESHOT SYS. VERIFIED RUDDER BIAS ACTUATOR AT FAULT. REPLACED RUDDER BIAS ACTUATOR WITH A REPAIRED UNIT IAW MM, CH. 27-20-30. OPS CK AND LK CK GOOD.