Thu, Jun 14, 2007
Remaining P6 Bays Due For Retraction Thursday
NASa reports astronauts Patrick Forrester and Steve Swanson
continued work to activate the International Space Station's
Starboard 3 and 4 (S3/S4) truss segment during STS-117's second
spacewalk. The 7-hour, 16-minute excursion wrapped up at 2144 EDT
Wednesday.
The spacewalking duo first assisted with the retraction of the
starboard solar array on the Port 6 (P6) truss. They left launch
restraints still attached on the S3/S4 Solar Alpha Rotary Joint
(SARJ), as flight controllers want to take a closer look at a drive
lock assembly on the SARJ. After the launch restraints are removed
on an upcoming spacewalk, the rotary joint will allow the S3/S4
arrays to track the sun as the station orbits Earth -- providing
the station with a steady supply of much-needed additional
power.
Thirteen of the P6's 31.5 array bays were retracted Wednesday,
and the crew will send commands Thursday to retract the remaining
bays. Before moving on to the SARJ, Forrester and Swanson "fluffed"
the array -- NASA's term -- to allow easier retraction on
Thursday.
The retraction of the P6 array clears the line of sight for the
S3/S4 arrays to track the sun and sets the stage for the P6's
relocation by a future shuttle crew from atop the station to the
end of the Port 5 truss.
Mission Specialist Jim Reilly coordinated the spacewalk, and
Pilot Lee Archambault operated the station's robotic arm. Two more
spacewalks are scheduled for STS-117, with the next one scheduled
for Friday.
In other activities, Expedition 15 Commander Fyodor Yurchikhin
and Flight Engineers Oleg Kotov and Clayton Anderson continued to
transfer cargo between the station and Space Shuttle Atlantis.
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