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Station Crew Repairs Station Environmental System

Published by Klaus Schmidt on Wed Jun 13, 2012 5:20 am via: NASA
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The International Space Station’s Expedition 31 crew enjoyed a mostly off-duty day Tuesday, but did find time to conduct some troubleshooting on the environmental control system.

Flight Engineers Don Pettit and Joe Acaba checked out the Carbon Dioxide Removal Assembly, or CDRA, in the station’s Destiny laboratory. Late Monday, the assembly shut down because of a faulty temperature sensor, one of three inside the system. Pettit and Acaba spent several hours rewiring the CDRA to bypass the problem and return the assembly to service. Meanwhile a second CDRA in the Tranquility module continued to operate normally, sufficiently removing carbon dioxide from the station’s atmosphere.

Flight Engineer Andre Kuipers spoke via ham radio with the winners of the Spaceship Earth competition in Lelystad, the Netherlands. In this competition, Kuipers had challenged students to research changes on the Earth’s surface that can be observed from space.

The crew also had several opportunities to observe and photograph several dynamic events taking place on the Earth below, including the Whitewater Baldy Complex fire in New Mexico and Arizona and a tropical depression building up east of the Philippines.

All six crew members, including Commander Oleg Kononenko and Flight Engineers Gennady Padalka and Sergei Revin, performed their daily two-hour exercise regimen to ward off the loss of muscle mass and bone density that occurs during long-duration spaceflight.

The crew otherwise spent the day off-duty to observe Russia Day, a holiday that recognizes national pride and social and economic achievements in Russian history. With the space station being an international effort, crews have always enjoyed a mixture of both American and Russian holidays.

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