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Station Crew Prepares for Next Spacewalk

Published by Klaus Schmidt on Thu Jul 29, 2010 8:25 am via: NASA
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The Expedition 24 crew members were busy Wednesday preparing for the next spacewalk of their mission while conducting post-spacewalk procedures following Tuesday’s successful excursion outside the International Space Station.

Flight Engineers Doug Wheelock and Tracy Caldwell Dyson worked in the Quest airlock to gather tools and configure the spacesuits they will wear during the expedition’s second spacewalk scheduled August 5.

Flight Engineer Doug Wheelock configures spacesuits inside the Quest airlock of the International Space Station. Credit: NASA TV

Flight Engineer Doug Wheelock configures spacesuits inside the Quest airlock of the International Space Station. Credit: NASA TV

Wheelock and Caldwell Dyson will install a power cable to the Unity module in preparation for the installation of the Permanent Multipurpose Module during the STS-133 mission in November. A Portable Data Grapple Fixture will be installed on the Zarya module that will extend the reach of Canadarm2, the station’s robotic arm, and increase a spacewalker’s access for assembly or maintenance work. They also will jettison multi-layer insulation removed for the grapple fixture installation and will mate power connectors to Zarya.

Caldwell Dyson will be making the first spacewalk of her career. Wheelock will be conducting his fourth. His first three spacewalks occurred as a mission specialist during STS-120 in late 2007.

Meanwhile, Flight Engineers Fyodor Yurchikhin and Mikhail Kornienko conducted post-spacewalk work following Tuesday’s excursion. The cosmonauts reconfigured the Russian Orlan spacesuits, reconfigured tools and conducted a conference with Russian spacewalk specialists.

Yurchikhin and Kornienko concluded the six-hour, 42-minute spacewalk Tuesday at 6:53 a.m. EDT. The pair outfitted the new Rassvet module for a Kurs automated rendezvous system capability for future dockings of Russian vehicles arriving at the station to link up to Rassvet. They also routed and mated Command and Data Handling cables on the Zvezda and Zarya modules.

The International Space Station operations team met late Monday to review results of last week’s dry run for using Canadarm2 and its Dextre robotic helper to replace a failed Remote Power Control Module (RPCM) in the P1 truss. The team elected to defer additional work with Dextre until additional analysis of the forces required to remove the smart circuit breaker from its housing in the truss is completed.

The delay will not affect plans for the upcoming spacewalk by Wheelock and Caldwell Dyson. Power systems on the station are operating well with the failed RPCM in its current installed position.

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