What was found
AC WAS ON TAKEOFF ROLL WHEN THE FLIGHT CREW NOTED A SUBSTANTIAL SPLIT BETWEEN AIRSPEED INDICATORS. AC WAS TAXIED BACK FOR TROUBLESHOOTING. PITOT/STATIC CHECKS WERE ACCOMPLISHED AND DISCREPANCY DUPLICATED. ALL PITOT AND STATIC LINES WERE DISCONNECTED AND NITROGEN WAS BLOWN INTO THE LINES. SEVERAL BUGS WERE REMOVED FROM THE LINES. ALL LINES WERE RECONNECTED AND PITOT/STATIC CHECKS RE ACCOMPLISHED AND ALL CHECKS NORMAL IAW MFG MM. (SW15200402394) (K)