page_title: Richard Mastracchio
section_title: STS-131
hierarchical_section_title: Richard Mastracchio / NASA career / STS-131
caption_attribution_description: English: NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, helped move a new 1,700-pound ammonia tank from space shuttle Discovery's cargo bay to a temporary parking place on the station, retrieved an experiment from the Japanese Kibo Laboratory exposed facility and replaced a Rate Gyro Assembly on one of the truss segments.
context_page_description: Richard Alan "Rick" Mastracchio is an American engineer and former NASA astronaut. He has flown on three NASA Space Shuttle missions as a mission specialist in addition to serving as a Flight Engineer on the Soyuz TMA-11M long duration mission aboard the International Space Station. He is currently the Senior Director of Operations for Commercial Resupply Services at Orbital ATK.
context_section_description: Discovery (April 5–20, 2010), a resupply mission to the International Space Station, was launched at night from the Kennedy Space Center. 
  On arrival at the station, Discovery's crew dropped off more than 27,000 pounds of hardware, supplies and equipment, including a tank full of ammonia coolant, new crew sleeping quarters, and three experiment racks. As the EVA lead, Mastracchio performed three spacewalks during this mission and logged 20 hours and 17 minutes of extravehicular activity. On the return journey, the Leonardo Multi-Purpose Logistics Module inside Discovery's payload bay was packed with over 6,000 pounds of hardware, science results, and trash. The STS-131 mission was accomplished in 15 days, 02 hours, 47 minutes, 10 seconds, and traveled 6,232,235 statute miles in 238 orbits.
  Mastracchio launched on Expedition 38/39 from the Baikonur Cosmodrome in Kazakhstan to the International Space Station along with Soyuz Commander Mikhail Tyurin of the Russian Federal Space Agency (Roscosmos) and Japan Aerospace Exploration Agency (JAXA) Flight Engineer Koichi Wakata. During his stay aboard the space station, Mastracchio conducted three spacewalks, the first two to remove and replace a faulty cooling pump, and the third to remove and replace a failed backup computer relay box. Mastracchio, Tyurin and Wakata returned to Earth after 188 days in space. During the expedition, the crew completed 3,008 orbits of the Earth and traveled more than 79.8 million miles.
caption: Mastracchio pictured during an EVA with Clayton Anderson as part of STS-131
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