November 23, 2008
Astronauts Transfer Cargo, Fourth Spacewalk Monday
HOUSTON "“ The third spacewalk by Endeavour astronauts outside the International Space Station will be the focus of today's activities aboard the two spacecraft.
Endeavour crew members Commander Chris Ferguson, Pilot Eric Boe and mission specialists Don Pettit, Steve Bowen, Heidemarie Stefanyshyn-Piper, Shane Kimbrough and Greg Chamitoff were awakened at 7:55 a.m. CST. The song was "You Are Here," by the group Dutton. It was played for Kimbrough.
Spacewalkers Piper and Bowen are scheduled to leave the station's Quest airlock at 12:45 p.m. Piper, the lead spacewalker, will wear the red-striped suit while Bowen will be in the all-white suit. Their work will be further cleaning and lubrication of the starboard Solar Alpha Rotary Joint (SARJ) and replacement of some of more its bearing assemblies.
The joint has seen limited use since September 2007 when flight controllers saw increased power consumption and vibration as it moved the 240-foot solar wings like a paddlewheel to follow the sun. Much of the work on all four spacewalks during Endeavour's stay at the station involves the starboard SARJ. The port SARJ, which continues to function well, will get a precautionary lubrication on the Monday spacewalk.
Kimbrough, who participated in the Thursday spacewalk, will be today's intravehicular officer, or spacewalk choreographer. The spacewalk is planned for about seven hours.
Just about every day Endeavour is at the station is moving day. Crew members of both spacecraft, including Expedition 18 commander Mike Fincke and flight engineers Yury Lonchakov and Sandy Magnus, will continue moving supplies and equipment between Endeavour and the International Space Station and work on station equipment.
Work continues to check out the Water Recovery System and its Urine Processor Assembly. The UPA was activated again overnight to gather more information on why it had shut down on previous tests. One theory is that its centrifuge might as it rotates be touching another structure.
Endeavour's crew is scheduled to go to bed at 11:55 p.m. today and be awakened at 7:55 a.m. Sunday. The next shuttle status report will be issued at the end of the crew day, or earlier if events warrant.
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