This was the first of three STS-131 spacewalks, the 234th conducted by U.S. astronauts, and the second Mastracchio and Anderson have conducted together. It was the 141st in support of International Space Station assembly and maintenance, totaling 879 hours, 43 minutes. It was the 113th spacewalk out of the space station, totaling 692 hours, 28 minutes.
Mastracchio’s four spacewalks total 24 hours, 40 minutes and Anderson’s four spacewalks total 24 hours, 38 minutes.
NASA Television airs a Mission Status Briefing at 10:30 a.m. with STS-131 Lead Space Station Flight Director Ron Spencer and STS-131 Lead Spacewalk Officer David Coan.