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Spacewalkers complete third excursion

Image above: STS-123 Mission Specialist Rick Linnehan transfers spare parts for the International Space Station's robotic arm, Canadarm2, during the mission's third spacewalk. Credit: NASA TV

STS-123 Mission Specialists Rick Linnehan and Robert L. Behnken KE5GGX completed the third spacewalk of the STS-123 mission at 1:44 a.m. EDT. The primary goal of this excursion, which lasted 6 hours and 53 minutes, was the completion of the outfitting of Dextre, the final element of the International Space Station’s Mobile Servicing System.

Linnehan and Behnken installed a spare parts platform and tool handling assembly for Dextre. Among other tasks, they also checked out and calibrated Dextre’s end effector and attached critical spare parts to an external stowage platform.

They were unable to attach a material sciences experiment to the Columbus module, but may have another opportunity later in the mission.