Commander Randy Bresnik ventured out for the second time in less than a week, along with Mark Vande Hei. During the excursion, they began the lubrication process on the Canadarm2's newly-installed latching end effector and swapped out a degraded video camera.
Bresnik and Vande Hei are slated to exit the Quest airlock around 8 a.m. EDT (1200 GMT). As the space station approached Italy, Mission Control urged the spacewalkers to take some photos for their crewmate, Paolo Nespoli.
This was the second #spacewalk of these astronauts in the last five days. Vande Hei is designated EV 2 and will wear a plain white spacesuit with no red stripes.
Bresnik will conduct another spacewalk October 18 with NASA astronaut Joe Acaba to finalize the servicing on the Canadarm2 robotic arm. "In order to do that, he'll have to first install a new socket onto the newly repaired latching end effector and then insert his foot restraint", Glenda Brown, the lead EVA officer for today's spacewalk, said during the briefing.
After lubricating the robotic arm, the two USA astronauts replaced the camera present on the station's truss. Also, on October 18, during the last and final spacewalk of the series, another camera named the "Old Yeller" present at the Destiny Laboratory, will be replaced with a new HD camera.
They also completed a variety of additional tasks, including replacing a smudged lens cover and removing two handrails from outside the tranquility module in preparation for a future wireless antenna installation.
A third spacewalk in the series is scheduled October 18 by Bresnik and station flight engineer Joe Acaba.