Space station astronauts plan second attempt to install power unit on Wednesday

Two crew members aboard the International Space Station will venture outside the orbiting complex for a second time in six days to install a replacement power-switching unit on the station, after an earlier attempt was unsuccessful. The spacewalk is scheduled to begin about 7:15 a.m. EDT on Wednesday. Flight Engineers Sunita Williams of NASA and Akihiko Hoshide of the Japan Aerospace Exploration Agency again will don U.S. spacesuits and exit the Quest airlock to complete the installation of a spare Main Bus Switching Unit (MBSU). More

(Source: The Examiner - Sep 4)