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[b]Spacewalkers complete pump replacement[/b]
More than six hours into today's spacewalk, Doug Wheelock and Tracy Caldwell Dyson have successfully replacing a failed ammonia coolant pump module with a spare unit and are now cleaning up their worksite.
The spacewalkers' work complete, flight controllers commanded from Mission Control in Houston for the newly-installed pump module to be filled with ammonia, beginning a multi-day process of restoring use of the station's cooling system Loop A.
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