NASA astronauts fix robotic arm during spacewalk
NASA astronauts Chris Williams and Jessica Meir stepped outside the International Space Station on Tuesday (June 30) to replace a malfunctioning wrist joint on the orbital complex's Canadarm2 robotic arm, the US space agency said. The joint failed during normal operations on May 27 after the arm drew elevated motor current and did not move as expected. NASA worked with the Canadian Space Agency (CSA) to diagnose the problem and determined a spacewalk was needed to swap in a spare already aboard the station. The spacewalk, the 280th in support of station assembly and maintenance, began at approximately 8:35 a.m. EDT (1235 GMT) and was expected to last roughly six and a half hours. It was the second spacewalk for Williams and the fifth for Meir. Repairs to the robotic arm are routine after more than 25 years of continuous operations, NASA said, as the system was designed with replaceable components and planned maintenance in mind.
NASA
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