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 SYS HORN SOUNDED. THE ACFT GROUND SPEED DID NOT EXCEED 20 KNOT. THE ACFT RETURNED TO BLOCKS WITHOUT INCIDENT. POST FLIGHT INSP AND OPS CHECKS WERE PERFORMED, NO DEFECTS WERE NOTED. ACFT WAS RETURNED TO SERVICE.