Narrative:

This was the first flight of the tour for both pilots; and we picked up our airplane out of maintenance. Taxied for takeoff on a short ferry flight. I was the flying pilot. During the takeoff roll; shortly after the 80 knot call to which I responded 'my controls'; I heard the abort callout; so I initiated an abort; catching sight of an abnormal KIAS boxed annunciator on my pfd. I also noted our speed deceleration thru the mid-90s knot range. We were cleared off the runway; I asked my partner what we had exactly; and he described a sizable difference in our indicated speeds; nearly 30 knots. We stopped; cleaned up; talked to ground control; and taxied very slowly back into the ramp. No debris was found in the pitot tubes or static ports on the post flight.I think we handled this well for the most part. We discussed abort criteria after returning to the ramp; and whether a gross discrepancy in indicated airspeeds qualifies as an abort criteria at the speed at which it was detected. I was a little slow in initiating the abort- the call for it wasn't very loud- more a headset/communication issue; so it took a second to absorb the abort command. Perhaps it was a very normal response time when out on the road and considering our normal expectations/biases of a normal takeoff.

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Original NASA ASRS Text

Title: HS125-900XP flight crew reported a rejected takeoff due to a difference in the airspeed indicators.

Narrative: This was the first flight of the tour for both pilots; and we picked up our airplane out of maintenance. Taxied for takeoff on a short ferry flight. I was the flying pilot. During the takeoff roll; shortly after the 80 knot call to which I responded 'my controls'; I heard the abort callout; so I initiated an abort; catching sight of an abnormal KIAS boxed annunciator on my PFD. I also noted our speed deceleration thru the mid-90s knot range. We were cleared off the runway; I asked my partner what we had exactly; and he described a sizable difference in our indicated speeds; nearly 30 knots. We stopped; cleaned up; talked to ground control; and taxied very slowly back into the ramp. No debris was found in the pitot tubes or static ports on the post flight.I think we handled this well for the most part. We discussed abort criteria after returning to the ramp; and whether a gross discrepancy in indicated airspeeds qualifies as an abort criteria at the speed at which it was detected. I was a little slow in initiating the abort- the call for it wasn't very loud- more a headset/communication issue; so it took a second to absorb the abort command. Perhaps it was a very normal response time when out on the road and considering our normal expectations/biases of a normal takeoff.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.