Spacewalks
At least three spacewalks were planned for this mission. The main objectives for the three EVAs were as follows:
| EVA | Spacewalkers | Start (UTC) | End (UTC) | Duration |
|---|---|---|---|---|
| EVA 1 | Rick Mastracchio Clayton Anderson |
9 April 2010 05:31 |
9 April 2010 11:58 |
6 hours 27 minutes |
| The crew inside used the station's robotic arm to remove a new ammonia tank from shuttle's payload bay and temporarily stow it on the station. The spacewalkers then retrieved a seed experiment from outside the Japanese laboratory, installed a grapple bar to the new ammonia tank on the station's truss and replaced a failed gyroscope that is part of the station's navigation system, along with several get-ahead tasks. | ||||
| EVA 2 | Mastracchio Anderson |
11 April 2010 05:30 |
11 April 2010 12:56 |
7 hours 26 minutes |
| Crew members, using the station's arm, removed an empty ammonia tank from the station's truss and temporarily stowed it on an equipment cart. The new tank was then installed and electrical connections were made to it. The station's arm then temporarily stowed the old tank on another part of the station's structure until the mission's third spacewalk. | ||||
| EVA 3 | Mastracchio Anderson |
13 April 2010 06:14 |
13 April 2010 12:36 |
6 hours 24 minutes |
| Using the station's arm, the crew moved the old tank into the shuttle's payload bay for return to Earth. The spacewalkers also removed a grapple bar from the old ammonia tank and attached it to the new one. The pair then relocated a foot restraint and some tools and prepared some cables for the STS-132 mission. | ||||
Read more about this topic: STS-131