As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATW - FLT 300 - CAPTAIN'S AIRSPEED INDICATOR READ ZERO ON TAKEOFF ROLL AT 80 KNOT SPEED CHECK, FIRST OFFICER'S WAS OK. ABORTED TAKEOFF AND RETURNED TO THE GATE. ATW MAINTENANCE PUMPED UP PITOT SYSTEM AND AIRSPEED READ NORMAL, MAINTENANCE CTL DECIDED TO REPLACE INDICATOR AS A PRECAUTION. ABORTED SECOND TAKEOFF WITH SAME PROBLEM, SWAPPED AIRCRAFT.