During the seven-hour, 11-minute spacewalk, Garan and astronaut Mike Fossum ( out of frame ), mission specialist, installed television cameras on the front and rear of the Kibo Japanese Pressurized Module ( JPM ) to assist Kibo robotic arm operations, removed thermal covers from the Kibo robotic arm, prepared an upper JPM docking port for flight day seven's attachment of the Kibo logistics module, readied a spare nitrogen tank assembly for its installation during the third spacewalk, retrieved a failed television camera from the Port 1 truss, and inspected the port Solar Alpha Rotary Joint ( SARJ ).
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During the spacewalk the astronauts installed the Floating Potential Measurement Unit ( FPMU ), installed two Materials on Materials International Space Station Experiment ( MISSE ) containers, installed a controller for a thermal radiator rotary joint, replaced a computer and installed a starboard jumper and spool positioning device ( SPD ), inspected a radiator beam valve module and installed another, installed a port jumper and SPD, tested an infrared camera, installed a light on the truss railway handcart, replaced a malfunctioning GPS antenna, installed a vacuum system valve, moved two articulated portable foot restraints, photographed a scratch on the airlock hatch, and retrieved a ball stack for inspection from PMA-1.
