[sarex] NEXT EVA 7 - FEBRUARY 4, 2007
azrowe80 at verizon.net
Fri Feb 2 11:58:55 PST 2007
SUBMITTED BY ARTHUR N1ORC - AMSAT A/C #31468
The first parts of the Feb. 4 spacewalk are similar to the previous one.
Lopez-Alegria and Williams begin the tasks of the second spacewalk by
reconfiguring the second of the two cooling loops serving Destiny from
the temporary to the permanent system.
At the rats’ nest, Lopez-Alegria will reconfigure the fluid loop
connections, moving the second pair of the fluid lines of the early
system from the lab and connecting them back up to the Z1 panel. That
will help enable reactivation of the early cooling system if it should
Williams will reconfigure electrical connections. The job, like the
similar activity on the first spacewalk, is expected to take about 1
hour, 45 minutes.
Next they will watch as the ground retracts the aft radiator of the P6.
After retraction they will install another set of six cable cinches and
two winch bars to secure the radiator and then install the shroud.
Again, those tasks should take about 2 hours, 20 minutes.
Lopez-Alegria will then move to the end of PMA-1 to remove a sunshade
from the Node Multiplexer-Demultiplexer (MDM), a data relay system. The
area was in the sun during the time the station flew in a previous
orientation. Now, with the station's orientation putting the lab in the
direction of travel and its 18-inch window always facing the Earth, the
sunshade is being removed to keep the MDM from getting too cold.
Lopez-Alegria will remove a single bolt to free the sunshade, then move
with it a short distance on the PMA-1 and jettison it aft and a little
Meanwhile, Williams will bring tools and cables to the forward end of
the lab, where Lopez-Alegria will join her. Together they will finish
routing and installation of the SSPTS cables.
Get-ahead tasks include photographing a connector on the end of PMA-2.
Shuttle-station audio communication difficulties have been reported
during recent shuttle missions. Engineers believe the connector might be
affected by debris or corrosion.
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