Sep 3 2009
From The Space Library
Astronauts John D. “Danny” Olivas and A. Christer Fuglesang undertook the second spacewalk of STS-128, lasting 6 hours and 39 minutes. The pair collected a new 1,700-pound (771- kilogram) ammonia tank from Discovery, attached it to the ISS, and connected the electrical and fluid lines. The new tank contained 600 pounds (272 kilograms) of fresh ammonia, which would help cool the station’s electrical systems. Olivas and Fuglesang then anchored the old ammonia tank inside Discovery in preparation for its return to Earth on the Shuttle. They had removed the old tank during their spacewalk on 1 September. The pair also had a few “get-ahead” tasks to complete. Fuglesang installed protective covers over cameras on the ISS robotic arm and positioned a portable foot restraint on a solar-power truss, to assist future assembly crews. Olivas was unable to complete his get-ahead task because a cable that he needed was not where flight controllers had expected it to be.
Marcia Dunn for Associated Press, “Spacewalk Performed Despite Approaching Space Junk,” 4 September 2009; Florida Today (Brevard, FL), “Spacewalkers Install Bulky Coolant Tank: Space Junk Not a Threat,” 4 September 2009; William Harwood, “Spacewalk No. 2 Complete,” Spaceflight Now, 4 September 2009.
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