Previous shuttle rollbacks
NASA FACT SHEET
Posted: October 20, 2008
Columbia was rolled back to the VAB, de-stacked, and the orbiter returned to the Orbiter Processing Facility because of a suspect exhaust nozzle on the right solid rocket booster.
Discovery was rolled back to the VAB following a pad abort on June 26. The vehicle was returned to the VAB, de-stacked, and the orbiter returned to the Orbiter Processing Facility to remove and replace the number three main engine which caused the abort.
Challenger was rolled back due to a timing problem with the primary payload, the Tracking and Data Relay Satellite-B. The vehicle was de-stacked in VAB and the orbiter returned to Orbiter Processing Facility. This mission, 51E, was cancelled and the orbiter re-manifested with 51B payloads.
Columbia was rolled back twice during preparations for mission STS-35. The first time occurred after a hydrogen leak was detected in the external tank/orbiter 17-inch umbilical.
Atlantis was rolled back to the VAB after tests confirmed a hydrogen fuel leak on the external tank side of the external tank/orbiter 17-inch quick disconnect umbilical. The vehicle was de-stacked.
Columbia was rolled back a second time due to the threat of severe weather from Tropical Storm Klaus.
Discovery rolled back to the VAB after significant cracks were found on all four lug hinges on the two external tank umbilical door drive mechanisms. The vehicle was de-stacked.
Endeavour was rolled back to the VAB after a pad abort due to an unacceptably high discharge temperature in the high-pressure oxidizer turbo pump on main engine number three. All three engines were replaced in the VAB.
Discovery was rolled back to the VAB after Yellow Flicker Woodpeckers drilled about 195 holes on the external tank foam insulation, many of which were too high up on the tank to be accessed at the pad for repairs.
Endeavour was rolled back to the VAB due to the threat of severe weather from Hurricane Erin which passed through Brevard County where the Kennedy Space Center is located.
Atlantis was rolled back to the VAB due to the threat of severe weather from Hurricane Bertha.
Atlantis was rolled back to the VAB due to the threat of severe weather from Hurricane Fran.
Discovery was rolled back to the VAB to repair hail damage to the external tank foam insulation.
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, so managers decided to roll Atlantis back into VAB high bay 3 using a secondary computer processor.
Atlantis was rolled back to the VAB due to uncertainty involving the integrity of the SRB cables.
Discovery was rolled back in order to get a new, modified external fuel tank in preparation for the Return to Flight mission.
Atlantis began rolling back to the VAB due to the threat of severe weather from Tropical Storm Ernesto, but weather advisories throughout the day showed that the storm was progressively weakening. Given the improvements in Ernesto's projected path and intensity, NASA chose to reverse the rollback decision and return the shuttle assembly to pad 39B.
After an intense hail storm hit launch pad 39A and damaged the foam insulation on the external fuel tank, Atlantis was returned to the VAB to undergo thorough inspections and repairs.
Failure of a science instrument command and data handling unit aboard the Hubble Space Telescope and the need to prepare a replacement device delays Atlantis' mission to service the observatory. The shuttle was moved off launch pad 39A to allow other flights to proceed during its half-year postponement.