Jul 20 2009
From The Space Library
NASA astronauts David A. Wolf and Thomas H. Marshburn made the second of STS-127’s five scheduled spacewalks, transferring to storage a spare KU-band antenna, a backup 1,300-pound (590-kilogram) coolant-system pump module, and a robotic-arm-transporter drive motor. The tasks were part of an effort to stow critical spare parts, to ensure that the ISS had everything it needed when the Shuttle fleet retired. The 6-hour-and-53-minute spacewalk took longer than expected, causing flight controllers to instruct Wolf and Marshburn to defer their final planned task of installing a television camera on the new JEF platform. Instead, Marshburn installed insulation on cables used to route station power to the Shuttle, and Wolf packed up tools and equipment. Marshburn experienced one potentially dangerous incident during the spacewalk when he lost track of his 85-foot (26-meter) safety tether, but he remained safely attached to the ISS with his 55-foot (17-meter) tether.
Todd Halvorson, “Station Stocks Up on Parts,” Florida Today (Brevard, FL), 21 July 2009; William Harwood, “Spacewalk No. 2 Ends,” Spaceflight Now, 21 July 2009.
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