posted 08-14-2006 03:13 AM               

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Shuttle communications antenna bolts a concern

Engineers are trying to determine whether critical bolts holding the shuttle Atlantis' KU-band antenna box in place are securely threaded, a potentially serious issue that could require tricky repairs before the ship's Aug. 27 launch, sources said Sunday.

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posted 08-15-2006 11:14 PM               

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A recent engineering review indicates two of the four bolts holding the KU antenna support box in place are too short. Engineers cannot directly inspect the bolts at the launch pad, but a paperwork review shows the bolts in question may be engaged by less than 2.4 threads. The requirement is 8.4 threads engaged.

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The KU bolt fix, if approved, would require engineers to extend an access platform into the open cargo bay from the payload change out room at pad 39B. A second platform then would be erected on the first to reach the antenna box. Safety nets would be required because the work would take place at a height of nearly 60 feet above the shuttle's aft bulkhead. In addition, the shuttle's robot arm and a 50-foot-long boom used to inspect the ship's heat shield would have to be moved to provide access.

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posted 08-16-2006 03:43 PM               

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Readiness review clears Atlantis to fly as planned

Launch of space shuttle Atlantis to restart orbital construction of the space station remains scheduled for 4:30 p.m. EDT on Sunday, August 27, NASA officials confirmed today at the conclusion of the Flight Readiness Review. The suspect communications antenna bolts and completing analysis of the auxiliary power unit heater issue seen on the last flight are items still left to be resolved.

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