As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6181 - IAD-BWI - ABORTED TAKEOFF, DUE TO THE CAPTAINS AIRSPEED INDICATOR FAILING ON THE TAKEOFF ROLL. AIRCRAFT RETURNED TO GATE WITH NO FURTHR INCIDENTS. MAINTENANCE REPLACED THE LEFT AIRSPEED INDICATOR. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)