Station Crew Unloads Progress, Does Maintenance
Aboard the orbiting International Space Station, the Expedition 20 crew began its week Monday by unloading the ISS Progress 34 resupply ship and performing station maintenance after successfully completing a repair to the Carbon Dioxide Removal Assembly (CDRA) late last week.
The CDRA stopped working Wednesday night. The problem occurred when it was shut down to reconfigure it from a special configuration setup for the shuttle mission. Efforts to turn the system back on failed. Flight Engineers Mike Barratt and Robert Thirsk worked Thursday and Friday to replace a heater controller and to isolate a heater element that was found to have a short in it. Late Friday night, the CDRA was reactivated and the maintenance work had done the trick, restoring full operation to the CO2 removal system in the U.S. segment. It continues to operate without issue.
Commander Gennady Padalka and Flight Engineer Roman Romanenko dedicated some time to unloading supplies from the Progress cargo craft, which docked to the station Wednesday. They also replaced some communications relay gear in the station's Russian segment.
Barratt and Flight Engineer Tim Kopra changed out a Battery Charger Module in the Quest airlock.
Early Saturday morning, the thrusters on the Progress 34 fired for seven minutes, 39 seconds to lift the orbital complex to the correct altitude for its rendezvous with space shuttle Discovery on the STS-128 mission, which is slated for launch later this month