Astronauts for the space shuttle Endeavour successfully conducted a spacewalk, their first of four.

Endeavour mission specialists Drew Feustel and Greg Chamitoff completed a six-hour, 19-minute spacewalk at 9:29 a.m. EDT. During the spacewalk, the astronauts installed antennas for the External Wireless Communication system, routing cables, setting up the antenna, installing handrails, and connecting power cables.

The spacewalk was ten minutes less than planned because of a carbon dioxide sensor failure in Chamitoff's spacesuit. The astronauts said there was no indication the suit's carbon dioxide levels would rise. Still, the astronauts were cautious and deferred tasks to remove a micrometeoroid debris shield to access and attach some of the connection points.

This is not the first time Feustel has conducted a spacewalk. In total, he's space walked for 27 hours and 17 minutes during four separate trips. On the contrary, this was Chamitoff's first spacewalk. Three more spacewalks are scheduled for this trip, with Feustel in all of them, and mission specialist Mike Fincke in two and Chamitoff in the other.

The 16-day mission will see the Endeavour crew deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre.

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