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Garrett Erin "Big G" Reisman

 Total EVAs:  3
 Total EVA time:  21h 12m

No. Date Together with Time Main tasks and notes
 1  14.03.2008  R. Linnehan  7h 01m
Preparing the JEM ELM PS for its removal from the shuttle's payload bay.
 2  17.05.2010  S. Bowen  7h 25m
Installing a spare space-to-ground Ku-band antenna on the station's truss, or backbone. Then they installed a new tool platform on Dextre. The spacewalkers breaked the torque on bolts holding batteries in place on the truss, in preparation for their removal and replacement on the second and third spacewalks. Battery preparation work was deferred from STS-131 to this flight.
 3  21.05.2010  M. Good  6h 46m
Installing the final two new batteries on the truss and put the old batteries on the carrier. Next, they retrieved a grapple fixture from Atlantis' payload bay and brought it inside the station for use as a spare.