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NASA Headquarters – July 10, 2006 – The second of three spacewalks scheduled for STS-121 is now in the books. Mission Specialists Piers Sellers and Mike Fossum completed both major objectives of the 6-hour, 47-minute excursion, which concluded at 3:01 p.m. EDT.
The first task the orbital duo completed was the installation of a spare thermal control system pump on to the outside of the Quest Airlock.
Then, Sellers and Fossum turned their attention to maintenance on the mobile transporter. They replaced a reel assembly for a cable that provides power and data to the station’s mobile transporter. The completion of this job gives the transporter fully functional primary and backup systems for use during future station assembly tasks.
Pilot Mark Kelly coordinated the spacewalk activities from inside Discovery, and Commander Steve Lindsey monitored vehicle systems and video setups. Mission Specialists Stephanie Wilson and Lisa Nowak were the robotic arm operators.
While the shuttle crew focused on the spacewalk, the Expedition 13 crew concentrated on packing scientific experiment results, unneeded items and trash from the station in preparation for the return to Earth.
The final scheduled spacewalk, which will feature on-orbit shuttle heat shield repair techniques, is slated to begin at 7:13 a.m. EDT Wednesday.
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Mike Fossum, attached to the end of the space station robotic arm, moves into position to replace the reel assembly of the mobile transporter. Photo credit: NASA TV
Astronaut Stephanie Wilson, STS-121 mission specialist, works with equipment on the middeck of the Space Shuttle Discovery while docked with the International Space Station. Photo Credit: NASA
STS-121 pilot Mark. Kelly uses a communication system as he refers to a procedures checklist on the aft flight deck of the Space Shuttle Discovery. Photo Credit: NASA
For More Information
STS-121 Home Page
Expedition 13 Home Page
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