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STS-111 REPORT #9



Submitted by Arthur - N1ORC

STS-111, Mission Control Center 
Status Report # 09
Sunday, June 9, 2002 – 5:30 a.m. CDT

Endeavour Astronauts Philippe Perrin and Franklin Chang-Díaz are set to
step out into the vacuum of space this morning for the first of three
spacewalks to help install a platform for the transport of the
International Space Station’s robotic arm and to replace a faulty joint
in the arm itself. 

With the help of Endeavour Pilot Paul Lockhart, who will help coordinate
the spacewalk from inside Endeavour, Chang-Díaz and Perrin will leave the
Quest Airlock this morning for a planned six-hour spacewalk to first
install a Power and Data Grapple Fixture to the station’s P6 truss for
its future relocation. The two first-time space walkers will then
temporarily park micrometeoroid debris shields on the Russian segment of
the station. Expedition Five Flight Engineer Peggy Whitson and ISS
Commander Valery Korzun will install the shields on the Zvezda Service
Module during a spacewalk set for late July. 

The final task of the spacewalk will involve the removal of thermal
blankets from the Mobile Base System. That component will be mated
tomorrow to the Mobile Transporter on the S0 (S-Zero) Truss of the ISS to
enable the Canadarm2 robotic arm to “walk off” the Destiny Laboratory
onto the station’s railcar system for transport up and down the length of
the complex. Chang-Díaz will be identifiable by solid red stripes on the
legs of his spacesuit. Perrin will wear the pure white suit with no
stripes. 

Commander Ken Cockrell will use the shuttle robotic arm’s cameras to
monitor the activities outside. Whitson and Endeavour Astronaut Carl Walz
will transport Chang-Díaz on the end of Canadarm2 during the spacewalk. 

During the spacewalk, Chang-Díaz will conduct a visual and photographic
inspection of one of the station’s four control moment gyroscopes (CMGs)
on the station’s Z1 Truss. The gyroscope experienced a mechanical failure
of its spin bearing yesterday and will no longer be able to be used to
assist in station attitude control. 

Three other CMGs are operating normally to provide full attitude control
for the ISS. If necessary, station control can be maintained with only
two functioning CMGs, with other backup attitude control systems also
available. The CMG failure will have no impact on ISS operations. A
substitute CMG is available on the ground and program managers are
evaluating future replacement options. To accommodate the use of three
CMGs and varying thermal conditions, the orientation of the shuttle and
station will be altered slightly for today’s spacewalk. 

Once the protective blankets are removed from the Mobile Base System,
Whitson and Walz will latch onto the platform in Endeavour’s cargo bay
with Canadarm2, remove it from its carrier, and maneuver it to a position
just above the Mobile Transporter, which was installed on the S-Zero
Truss in April. Canadarm2 will be left in a parked position overnight to
thermally condition the Mobile Base System before it is mated to the
Transporter railcar Monday. 

At the start of their fifth day in space, Endeavour’s crew was awakened
at 4:23 a.m. Central time to the sound of “Drops of Jupiter” by Train, a
tune selected for Cockrell. 

The next STS-111 status report will be issued Sunday evening following
the spacewalk, or earlier, if events warrant. 

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