Tue, Jul 11, 2006
ISS Mobile Transporter Back On The Job
Spacewalking astronauts Piers Sellers and Michael Fossum were
high-altitude repairmen Monday, as they worked on the International
Space Station's Mobile Transporter rail system... putting a cart
back on the tracks and, in the process, dealing with problems of
NASA reports that Sellers' backpack -- a critical piece of
equipment should his tether to the station itself come loose --
kept trying to float away on its own. The problem was in a faulty
clamp; Fossum finally fixed the problem by improvising a tether
between Sellers and the pack itself.
Fixing that rail cart has been a priority, as it is necessary
for completing the space station. Without it... the heavier
materials needed for continued work on the ISS would be impossible
to haul around... and now that the shuttle's are back on the job
again... the schedule is very tight.
At the start of their six hour, 47 minute spacewalk, Sellers and
Fossum also installed a spare thermal control system pump on a
stowage platform outside the station.
With the second spacewalk of STS-121 now in the books, the crew
onboard Discovery can look forward to a relatively light workload
Tuesday... before Sellers and Fossum once again trek outside the
orbiter, to test out materials future astronauts may use to repair
glitches in the shuttle's heat shield on future missions.
The two astronauts are scheduled to begin that spacewalk
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