NASA ISS Spacewalk Repair Bumped to Aug. 6
Two astronauts aboard the International Space Station will embark on a spacewalk Aug. 6 to replace a failed ammonia pump module on the spacecraft.NASA has decided to wait until Aug. 6 to conduct a spacewalk to replace a failed ammonia pump module on the International Space Station. The spacewalk had originally been planned for Aug. 5. Mission managers, program managers, flight controllers, engineers, astronauts and spacewalk experts made the decision the night of Aug. 2 after continuing to analyze and refine engineering requirements and reviewing the results of an underwater practice session, the space agency reported. Expedition 24 astronauts Doug Wheelock and Tracy Caldwell Dyson currently are scheduled to start the repairs on the station's starboard (right) truss Aug. 6. NASA reported fellow astronauts Cady Coleman and Suni Williams spent the afternoon in the Johnson Space Center's Neutral Buoyancy Laboratory practicing underwater the tasks needed to restore the cooling loop over the course of two spacewalks.
The space agency noted the station remains in a stable configuration and the crew is on a normal sleep shift and supporting a normal workday, but most of their planned activities this week have been canceled or deferred in order to support spacewalk preparations. In the first spacewalk, they will unbolt and remove the failed pump module and install the spare. A second spacewalk to hook up a variety of electrical and fluid connections for the new pump module is targeted for Aug. 9, NASA reported.