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[b]Second of three spacewalks planned for Wednesday[/b]
NASA's flight controllers and engineers continue meetings to review the results from the first spacewalk and to plan for the second of what now will be three excursions to complete the replacement of a failed pump module on the station's starboard truss.
Station program managers have laid out procedures for Expedition 24 flight engineers Doug Wheelock and Tracy Caldwell Dyson to perform at the start of the next spacewalk, now planned for Wednesday. The tasks are designed to greatly reduce, or eliminate the possibility of ammonia coolant leaking from the final fluid connector, M3, when it is demated, setting the stage for the failed pump module to be removed.
The plan calls for the astronauts to close other quick disconnect lines where the S1 and S0 trusses meet, which should isolate ammonia upstream from the final connector, in turn preventing any recurrence of leakage while the new pump module is being installed.
Wheelock and Caldwell Dyson will then configure lines and valves prior to demating the final electrical connections from the old pump so that it can be parked on a stowage bracket on the ISS's mobile base system.
NASA's mission management team will meet on Tuesday morning to provide its final approval for the spacewalk as planned to proceed.
Station systems remain in good condition operating on the second of two cooling loops. NASA says the astronauts are well rested following Saturday's spacewalk, having spent the last two days recharging spacesuit batteries, reviewing spacewalk procedures and configuring tools for their next excursion.
NASA TV coverage of the second spacewalk will begin at 5 a.m. CDT Wednesday. The spacewalk is scheduled to begin around 5:55 a.m.
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