The PFCS is a key component of the stations cooling system and controls the ammonia that flows through it, according to NASA. The old PFCS will be moved to the spare parts platform that the new one was taken from.
The goal of the NASA spacewalk is to upgrade the station's cooling system hardware, as well as installing new communications equipment that will be used for future docking of commercial care spacecraft.
Coverage was expected to begin a couple of hours before the walk, at around 6:30 a.m.
Image In 1984 Bruce Mc Candless became the first astronaut to move about in space without a tether. Pic NASA
A second spacewalk involving Arnold and Feustel is scheduled for June 14.
Feustel and Arnold arrived at the ISS on March 23 and are slated to return to Earth in October. They'll also replace a camera system on the Destiny Laboratory and a communications receiver.
The astronauts on the International Space Station are getting some spring cleaning done Wednesday morning. With SpaceX quickly becoming a force to be reckoned with, the ability to better support their ships and Boeing's ships will be a welcome change for everyone involved.
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