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Station Astronauts Complete Spacewalk

Published by Klaus Schmidt on Wed Jul 13, 2011 9:12 am via: NASA
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Transfer work continued inside and outside of the International Space Station Tuesday, as the crew performed the first and only spacewalk of the STS-135 mission.

Expedition 28 Flight Engineers Mike Fossum and Ron Garan wrapped up a six-hour, 31 minute spacewalk at 3:53 p.m. EDT Tuesday. With STS-135 Mission Specialist Rex Walheim choreographing the spacewalk from inside the station, Fossum and Garan packed a pump module that failed in 2010 into the shuttle’s cargo bay. It was moved into a temporary storage location on external stowage platform-2 during the STS-133 mission earlier this year. Returning it to Earth will allow engineers to look into what caused its failure and then refurbish it for use as a spare.

The two spacewalkers also installed the Robotic Refueling Mission experiment on a platform used by the Special Purpose Dexterous Manipulator, or Dextre, to hold spare parts. The Robotic Refueling Mission will demonstrate and test the tools, technologies and techniques needed to robotically refuel and repair satellites in space.

Later, Fossum fixed a grounding wire protruding from a Zarya module payload data grapple fixture (PDGF) that was installed on STS-134. The PDGF is a mounting position that the station’s robotic arm can attach to for access to the Russian segment. The spacewalkers also installed a cover on the end of pressurized mating adapter 3 to protect it from an extensive amount of direct sunlight.

Meanwhile, inside the space station, every member of the shuttle crew and many of the station crew worked to unload the newly installed Raffaello multipurpose logistics module. It brought up 9,400 pounds of cargo to the space station, all of which must be unloaded and replaced with 5,700 pounds of trash and used equipment to return home.

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