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  • [No.]: 6
    [Date]: 1990-10-09
    [Orbiter]: Columbia
    [Mission]: STS-35
    [Reason]: Weather
    [Description]: Weather threat from Tropical Storm Klaus.

  • [No.]: 8
    [Date]: 1994-08-24
    [Orbiter]: Endeavour
    [Mission]: STS-68
    [Reason]: Abort
    [Description]: Pad abort due to a high discharge temperature in a pump on main engine number three. All three engines were replaced in the VAB.

  • [No.]: 14
    [Date]: 2001-01-02
    [Orbiter]: Atlantis
    [Mission]: STS-98
    [Reason]: Crawler failure
    [Description]: Atlantis began rollout to Launch Pad 39A, but an hour later stopped on the crawler path so engineers could troubleshoot a failed computer processor on the crawler transporter. Troubleshooting efforts were unsuccessful, the shuttle was returned to the VAB using a secondary computer processor.

  • [No.]: 19
    [Date]: 2008-10-20
    [Orbiter]: Atlantis
    [Mission]: STS-125
    [Reason]: Payload
    [Description]: Atlantis was moved back to the VAB to allow time to troubleshoot a problem with the Hubble Space Telescope on orbit. Hardware to correct the problem was added to the STS-125 mission payload. Atlantis was then successfully launched on May 11, 2009.

  • [No.]: 5
    [Date]: 1990-08-09
    [Orbiter]: Atlantis
    [Mission]: STS-38
    [Reason]: Fuel leak
    [Description]: Atlantis was rolled back after tests confirmed a hydrogen fuel leak on the external tank side of the external tank/orbiter quick-disconnect umbilical.

  • [No.]: 4
    [Date]: 1990-06-12
    [Orbiter]: Columbia
    [Mission]: STS-35
    [Reason]: Inspection failure
    [Description]: A hydrogen leak was detected in External tank (ET) umbilical.

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About This Tool

Rollbacks are the terminology used by NASA to roll the shuttle back from the mobile launch pad and the launch pad on top of the tracked Vehicle Assembly Building. If the aircraft is unable to launch due to bad weather or other reasons, many factors may need to roll back. Rollback times like this have occurred many times in history, and the tool only randomly selected 20 of them to introduce.

In the generator, we can see the exact beginning and end of the rollback times of these buses. It includes the detailed date of the rollback, the Orbiter, the tasks to be completed, the reason for the rollback, and the main description of the rollback at the time. In summary, rollback is most likely due to Inspection failure, Weather, Abort, Fuel leak, Payload, External tank repairs, and several other major causes affecting the actual time of launch.

Click the "Display All Items" button and you will get a list of Space Shuttle rollbacks.

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