The 3rd STS-131 spacewalk ended at 8:38 a.m. EDT, a 6-hour, 24-minute outing for Mission Specialists Rick Mastracchio & Clayton Anderson.The spacewalkers fell behind the timeline when an alignment issue delayed the stowage of the depleted Ammonia Tank Assembly on a carrier in space shuttle Discovery's cargo bay. Some planned tasks had to be deferred. Before wrapping up, the spacewalkers relocated a portable foot restraint & prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, 2 chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.
This was the final STS-131 spacewalk, the 236th conducted by U.S. astronauts, & the 6th for both Mastracchio & Anderson. It was the 143rd in support of International Space Station assembly & maintenance, totaling 893 hours, 33 minutes. It was the 115th spacewalk based out of the space station, totaling 706 hours, 18 minutes.
Mastracchio's six spacewalks total 38 hours, 30 minutes & Anderson's 6 spacewalks total 38 hours, 28 minutes. The pair now ranks 21st & 22nd on the list of cumulative spacewalk time. NASA Television airs a Mission Status Briefing at 11:30 a.m. with STS-131 Lead Space Station Flight Director Ron Spencer & STS-131 Lead Spacewalk Officer David Coan.
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