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More Details for 2007-06-16
STS-117 MCC Status Report #17

In a continuing improvement of the onboard Russian computer system, all six channels are now operating in the two Russian command-and-control and the guidance-and-navigation computers that stopped operating three days ago.

During a news briefing from the Johnson Space Center Saturday afternoon, International Space Station Program Manager Michael Suffredini said, “We’re having a great day on orbit today.”

Yesterday, station Commander Fyodor Yurchikhin and Flight Engineer Oleg Kotov were able to reenable four of the six channels in the computer systems after bypassing what appears to be a faulty power switch with external cabling.

The Russian cosmonauts repeated that same modification today on the last two channels, which were originally suspected to have failed. They are continuing to checkout and troubleshoot the computers. Meanwhile, the forward plan is to keep the original four channels active and keep the other two channels in "stand by" mode.

Engineering teams also plan to test the Russian attitude control system as early as Sunday morning, in order to confirm that it is operating and working well in concert with the U.S. system. The specifics of the test are still being defined but once executed, the teams will determine when shuttle Atlantis will depart the station. Undocking is currently scheduled for Tuesday morning.

Onboard, the rest of the crew today focused on transfer activities as well as preparations for a fourth spacewalk tomorrow. The ten astronauts, including Expedition 15 Flight Engineer Clay Anderson, and shuttle Commander Rick Sturckow, Pilot Lee Archambault, and mission specialists Pat Forrester, Steven Swanson, Danny Olivas, Jim Reilly and Sunita Williams, also participated in a joint crew news conference.

During their crew sleep, Williams established a new record for the longest single spaceflight by a female. At 12:47 a.m. CDT, Williams surpassed the longstanding 188 day and 4 hour record set by astronaut Shannon Lucid at the Mir space station in 1996.

“I was just in the right place at the right time,” said Williams of the record. “It’s an honor to be here.”

The four spacewalkers spent time working on the U.S. spacesuits. Olivas and Reilly finished their post-spacewalk spacesuit reconfiguration tasks, while Forrester and Swanson configured their suits and tools for their second spacewalk. The final spacewalk of the flight is set to begin Sunday morning at 11:33 a.m. CDT.

The spacewalk will include a few wrap up tasks associated with the new truss segment, including installation of the Drive Lock Assembly 2, which with a second DLA, drives rotation of the S3/S4 Truss Solar Alpha Rotary Joint. The spacewalkers also will remove the final six launch restraints on the SARJ to enable its rotation and remove a keel pin and drag link from S3. They’ll also complete installation of a debris shield on the Destiny laboratory, install a computer network cable on Unity and remove a Global Positioning System antenna.


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