Watch: NASA astronauts perform spacewalk to conduct maintenance on ISS

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

HOUSTON – Two NASA astronauts are performing a spacewalk Wednesday outside the International Space Station.

NASA says Expedition 55 flight engineers Andrew Feustel and Ricky Arnold will perform maintenance work on the ISS, which includes moving a Pump Flow Control Subassembly (PFCS) from a spare parts platform on the station’s truss “backbone” to the Special Purpose Dexterous Manipulator (Dextre) robotic arm.

NASA says the PFCS drives and controls the flow of ammonia through the exterior portions of the station’s cooling system.

Feustel and Arnold will also replace a camera system on the Destiny Laboratory and a communications receiver.

Fuestel and Arnold arrived at the ISS on March 23 after launching to the station on March 21 on board a Soyuz MS-08 spacecraft with Russian cosmonaut Oleg Artemyev.

This is Fuestel’s 8th spacewalk and Arnold’s 4th. This also be the 50th spacewalk originating from the station’s Quest airlock.

RELATED: 

Watch: NASA astronauts perform spacewalk outside ISS

Watch: Soyuz rocket launches to International Space Station

Watch: NASA astronauts perform spacewalk outside International Space Station

Watch: Cargo spacecraft launched from Wallops Island arrives at ISS

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.