Narrative:

Flight was delayed for a few hours and tail swapped due to original aircraft being damaged in thunderstorm/windstorm. On takeoff roll (305;000 pounds; flap 15) after 80 KT call; I observed a large orange off flag on captain's primary altimeter. My immediate thought was of a possible pitot static problem due to previous storm. I also thought our speed was slower than it probably was and called reject. Shortly after initiating the rejected takeoff; I felt we were slowing with plenty of remaining runway and started manual braking. We taxied clear and coordinated with ground on a safe place to be without setting the parking brake. I asked the first officer what he felt the high speed reached was and he said 110-120. I was surprised thinking it was closer to 100; but he is probably more accurate. We contacted dispatch and coordinated with [maintenance] and were advised to return to the ramp as the altimeter was not deferrable. Working with ground we did a very slow taxi back to the ramp to allow the brakes/tires to cool. Highest temperature indicated was a 6 on one wheel. By the time we reached the ramp and parked it had cooled to a 5 or 4. Entered items in logbook and maintenance started working what initially appears to be an air data computer problem.

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Original NASA ASRS Text

Title: B767-300 flight crew reported they rejected their takeoff when the Captain's altimeter showed a flag at 110-120 KTS.

Narrative: Flight was delayed for a few hours and tail swapped due to original aircraft being damaged in thunderstorm/windstorm. On takeoff roll (305;000 LBS; Flap 15) after 80 KT call; I observed a large orange OFF flag on Captain's Primary Altimeter. My immediate thought was of a possible pitot static problem due to previous storm. I also thought our speed was slower than it probably was and called reject. Shortly after initiating the rejected takeoff; I felt we were slowing with plenty of remaining runway and started manual braking. We taxied clear and coordinated with ground on a safe place to be without setting the parking brake. I asked the First Officer what he felt the high speed reached was and he said 110-120. I was surprised thinking it was closer to 100; but he is probably more accurate. We contacted Dispatch and coordinated with [Maintenance] and were advised to return to the ramp as the altimeter was not deferrable. Working with Ground we did a very slow taxi back to the ramp to allow the brakes/tires to cool. Highest temperature indicated was a 6 on one wheel. By the time we reached the ramp and parked it had cooled to a 5 or 4. Entered items in logbook and Maintenance started working what initially appears to be an ADC problem.

Data retrieved from NASA's ASRS site as of July 2013 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.