Two NASA astronauts completed the fifth spacewalk successfully

Two NASA astronauts completed the fifth spacewalk successfully. Spend 6 hours, 31 minutes to undertake maintenance operations on the orbital outpost.

Expedition 55 Flight Engineers Drew Feustel and Ricky Arnold of NASA moved the Pump Flow Control Subassembly (PFCS) from a spare parts platform on the station’s truss to the Dextre robotic arm.

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

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The team then removed and replaced a camera group and a degraded Space to Ground Transmitter Receiver Controller, and was also able to accomplish several get-ahead activities.

Spacewalkers have now spent a total of 54 days, 16 hours and 40 minutes working outside the station in support of assembly and maintenance of the orbiting laboratory.