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Submitted by Arthur - N1ORC

STS-111, Mission Control Center 
Status Report # 14
Tuesday, June 11, 2002 – 7 p.m. CDT

In a 5-hour spacewalk today, Endeavour astronauts Franklin Chang-Díaz and
Philippe Perrin completed installation of the Mobile Remote Servicer Base
System, or MBS, on the International Space Station’s railcar, the Mobile
Transporter. With those tasks completed, they established a moveable base
for future use by the station’s robotic arm, Canadarm2. 

Chang-Díaz and Perrin ventured outside the station’s Quest airlock at
10:20 a.m. Central time. With the help of Pilot Paul Lockhart, who guided
the spacewalk from inside the shuttle, Chang-Díaz and Perrin first
connected primary and backup cables for video and data, and primary power
cables between the Mobile Transporter railcar and the MBS. Once the
connections were made, ground controllers sent commands for the MT to
remotely plug in its umbilical attachments to receptacles on the S0
(S-Zero) truss railway. 

With that complete, Chang-Díaz and Perrin then deployed an auxiliary
grapple fixture on the MBS called the Payload Orbital Replacement Unit
Accommodation, or POA, and placed it in its final configuration.
Identical to the end effectors on Canadarm2, the fixture can grapple
payloads and hold them as they are moved along the station’s truss atop
the MBS. 

Continuing to run ahead of schedule, the two spacewalkers then secured
four bolts between the MBS and the railcar, completing installation of
the new MBS platform. Later this month or next, Canadarm2 will “walk off”
the Destiny Laboratory and mate its free hand to any one of four power
and data fixtures on the new platform so it can be driven up and down the
length of the station’s truss for use in future station assembly and
maintenance operations. 

The spacewalkers then relocated a television camera to its final position
on top of a mast atop the MBS. The camera will provide views of station
assembly and maintenance operations to ground controllers. Final tasks
included adding an extra extension cable for the platform, a wire tie to
one of the cables installed earlier during the spacewalk and to
photograph connectors near the lower portion of the MBS that tie into the

Following an inventory of the tools they used during the spacewalk,
Perrin and Chang-Díaz re-entered Quest. Airlock repressurization began at
3:20 p.m. Central time, signaling the end of the spacewalk. It was the
40th spacewalk in support of ISS assembly and maintenance and the second
of the mission, bringing the total spacewalking time for STS-111 to 12
hours and 14 minutes. 

After flight controllers verified that all connections on the Mobile
Remote Servicer Base System were working properly, the capture latch on
Canadarm2 was released. The arm, which had been supplying power to the
MBS, was then repositioned for Thursday’s third and final spacewalk of
the mission, which will see replacement of its wrist roll joint. 

Handover conferences between the two Expedition crews and the transfer of
equipment and supplies to the Leonardo Multi-Purpose Logistics Module
also continued today. Working ahead of schedule, the crew continued to
refill the module with unneeded supplies to be returned to Earth. 

At 9:19 Central time tonight, Endeavour crewmembers and former Expedition
Four Flight Engineers Carl Walz and Dan Bursch will set a new U.S. space
endurance record, exceeding Shannon Lucid’s record of 188 consecutive
days spent in space. Walz will set another record in the process,
exceeding Lucid’s U.S. record for cumulative days spent in space as he
reaches 223 days accrued over the course of five flights. Expedition 4
Commander Yury Onufrienko has spent a total 381 days in space, but
remains far behind the world record for time in space of 747 days, held
by Sergei Avdeyev. 

The next STS-111 status report will be issued Wednesday morning after
crew wakeup, or earlier, if events warrant.


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