As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, THE TAKEOFF WARNING HORN BEGAN TO SOUND. THE TAKEOFF WAS ABORTED AND THE ACFT RETURNED TO GATE. MX POWERED DOWN THEN POWERED UP THE ACFT AND GROUND RAN THE ACFT TWICE. NO DEFECTS WERE NOTED AND THE ACFT WAS THEN RETURNED TO SERVICE.