Expedition 24

Expedition 24 was the 24th long-duration mission to the International Space Station (ISS). Expedition 24 initially had two planned spacewalks, one Russian and one American Extra-vehicular Activity (EVA). The U.S. EVA was re-planned and a second U.S. EVA was added.

Quick Facts Mission type, Space station ...
A last-quarter crescent moon above Earth's horizon is featured in this image photographed by an Expedition 24 crew member.


More information Position, First part (June 2010) ...

Backup crew


Ammonia pump module

On 31 July 2010, the Expedition 24 crew was awoken by an alarm on the station. The alarm was caused by a cooling pump that had failed and caused a Remote Power Controller to trip and cut power to some of the International Space Station (ISS). Astronauts Tracy Caldwell Dyson and Doug Wheelock performed some steps to assist ground controllers in re-powering some of the station components such as two main power buses and one Control Moment Gyroscope. After the steps had been completed Capcomm James Kelly told the crew they could go back to bed as all the work required by the crew on the ISS was complete. A short time later, another alarm sounded and awoke the crew, when the ground attempted to restart the pump module.[3]

Docking ring

A failure in the docking ring on the Mini-Research Module 2 (MRM2) Poisk, caused a delay in the planned landing of the Soyuz TMA-18 spacecraft. Soyuz TMA-18 was originally planned to undock and land on 24 September 2010, but instead undocked less than 24 hours later on 25 September 2010. The failure is believed to be due to a faulty indication from a micro-switch on the hatch between the Soyuz and MRM2. A drive gear, which is related to the docking mechanism was also found to have two broken teeth, and is believed to be related to the problem as well.[4]


Shannon Walker is pictured near the robotic workstation in the Destiny laboratory during the EVA 2 on 7 August 2010.
Wheelock egresses the Quest Airlock hatch on the ISS during the EVA 3 on 11 August 2010.

Three spacewalks, one in Orlan space suits and two in U.S. Extravehicular Mobility Units (EMUs) were originally planned for Expedition 24. However, additional spacewalking tasks were added to remove and replace a failed ammonia pump module.

More information Mission, Spacewalkers ...

denotes spacewalks performed from the Pirs docking compartment in Russian Orlan suits.


Public Domain This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.

  1. NASA HQ (2008). "NASA Assigns Space Station Crews, Updates Expedition Numbering". NASA. Archived from the original on 17 April 2012. Retrieved 21 November 2008.
  2. NASA HQ (2009). "NASA and its International Partners Assign Space Station Crews". NASA. Retrieved 7 October 2009.
  3. Bill Harwood. "Spacewalks needed to fix station cooling problem". Spaceflightnow.com. Retrieved 2 August 2010.
  4. Chris Bergin. "Soyuz TMA-18 home after second undocking attempt success". NASASpaceflight.com. Retrieved 25 September 2010.
  5. Chris Bergin. "Opening ISS spacewalk to replace coolant pump completed". NASASpaceflight.com. Retrieved 7 August 2010.
  6. Chris Gebhardt (11 August 2010). "Large success for second EVA as failed Pump Module is removed". NASAspaceflight.com. Retrieved 12 August 2010.
  7. William Harwood (11 August 2010). "Station's bad pump removed; more spacewalking ahead". Spaceflight Now. Retrieved 12 August 2010.
  8. NASA (16 August 2010). "Spacewalkers Install Spare Ammonia Pump". Archived from the original on 22 May 2017. Retrieved 19 August 2010.

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This article uses material from the Wikipedia article Expedition_24, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.