As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL THE CAPTAINS AIRSPEED INDICATOR BEGAN TO CYCLE FROM 0-300 KNOTS. THE TAKEOFF WAS ABORTED WHERE THE CREW RETURNED TO BLOCKS WITHOUT INCIDENT. POST FLIGHT INSP WAS PERFORMED AND THE CAPTAINS AIRSPEED INDICATOR WAS REMOVED AND REPLACED. OPS CHECKS WERE GOOD AND NO OTHER DEFECTS WERE NOTED. ACFT WAS RETURNED TO SERVICE.