While traveling at 17,133 mph 261 miles above the Earth Astronauts Reid Wiseman and Butch E. Wilmore took a 6h 34m excursion outside the space station today to perform a number of tasks needed for the continued operation and future changes to the ISS.
The first task they completed was the replacement of the Power System 3A Sequential Shunt Unit (SSU) that failed back in May. This task had to be completed during a night pass of the station to ensure the safety of the astronauts. With only a couple of minutes to spare they were able to complete the task successfully and a while later the stations power systems office confirmed that the new unit was working correctly, The 3A power system will be re-integrated into the stations power system tomorrow.
They then moved onto the second task the relocation of a portable foot restraint and tool stanchion from the P1 truss to the S0 truss.
Next they removed a failed camera system from the P1 truss, which was returned to the station airlock. They then removed the camera stanchion as that is needed on the Harmony module,
After that the astronauts split up with Wilmore heading to the Harmony module to install the stanchion and Wiseman heading to retrieve a wireless TV antenna (WETA) which will be placed on the stanchion. The installation of the stanchion proved to be difficult with both Wilmore and Wiseman working on it for 30 minutes before finally they were able to get the bolts to catch.
Wiseman then did the initial installation of the WETA before heading back to the airlock with the failed camera. Meanwhile Wilmore remained at the site to complete the installation of the WETA before cleaning up the work site.
Wiseman then retrieve a new camera from the airlock which was installed on the P1 truss where the WETA was removed earlier. During this camera installation Houston advised the pair that the WETA was operating successfully.
This was the second spacewalk for Reid Wiseman and the first for Butch Wilmore.
Below are some screen captures of the space walk from NASA TV