Troubleshooting efforts were unsuccessful, the shuttle was returned to the VAB using a secondary computer processor.Ītlantis was returned to the VAB due to uncertainty involving the integrity of the SRB cables.ĭiscovery was returned to the VAB in order to get a new, modified external fuel tank in preparation for the first Return to Flight mission following the Columbia accident.Ītlantis was moved back towards the VAB due to threat of severe weather from Tropical Storm Ernesto. Yellow flicker woodpeckers drilled approximately 71 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.Įndeavour was moved back to the VAB due to threat of severe weather from Hurricane Erin.Ītlantis was moved back to the VAB due to threat of severe weather from Hurricane Bertha.Ītlantis was moved back to the VAB due to threat of severe weather from Hurricane Fran.ĭiscovery was moved back to the VAB to repair hail damage to the external tank foam insulation.Ītlantis 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. All three engines were replaced in the VAB. Pad abort due to a high discharge temperature in a pump on main engine number three. Weather threat from Tropical Storm Klaus.ĭiscovery was 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 mission, STS-51E, was canceled and the orbiter was re-manifested with 51-B payloads.Ī hydrogen leak was detected in External tank (ET) umbilical.Ītlantis was rolled back after tests confirmed a hydrogen fuel leak on the external tank side of the external tank/orbiter quick-disconnect umbilical.
The vehicle was de-stacked in the VAB and the orbiter returned to Orbiter Processing Facility. Space shuttle main engine (SSME) #3 replaced after a launch abort.Ĭhallenger was rolled back from Pad 39A due to a timing problem with the primary payload, the Tracking and Data Relay Satellite-B (TDRS-B). Columbia was de-stacked and moved back to the Orbiter Processing Facility (OPF). Suspect exhaust nozzle on right solid rocket booster. Shuttle rollbacks are listed in chronological order: No. A variety of factors could require a rollback, from severe weather to the need for repairs that could not be performed at the launch pad. "Rollback" is the term NASA uses when the Space Shuttle was rolled back from the launch pad atop the mobile launcher platform and Crawler-transporter to the Vehicle Assembly Building (VAB). It is pointed out that during the Space Shuttle era, when the number of spacecraft to be processed simultaneously at Kennedy will double or triple, all spacecraft processing facilities will be required to handle the workload.This is a list of Space Shuttle rollbacks. Horizontally handled spacecraft such as Spacelab, which are inserted into the Orbiter cargo bay while it is in the Orbiter Processing Facility in the horizontal position, are assembled and checked out within the Operations and Checkout Building, where the CITE tests are performed and the Spacelab will be disassembled, and then transported to the Orbiter Processing Facility. The processing flow for vertically handled spacecraft, which are inserted into the Shuttle orbiter cargo bay while the orbiter is in the vertical position and often are attached to a separate solid booster stage, includes assembly into unified payloads in the Vertical Processing Facility, followed by Cargo Integration Test Equipment tests to ensure cargo bay compatibility, and transportation to the launch pad.
The spacecraft processing techniques to be used at the Kennedy Space Center for the assembly and check-out of Space Shuttle cargoes are discussed.
0 kommentar(er)
