Space Station's Canadarm2 Robot Arm Repaired by Astronauts

On June 30, 2026, NASA astronauts Chris Williams and Jessica Meir completed a seven-hour spacewalk to replace a malfunctioning wrist joint on the International Space Station’s Canadarm2 robotic arm, a critical component used for maintenance and cargo operations. The task, conducted from the U.S. segment of the ISS, marked the 268th extravehicular activity (EVA) in the station’s history and required precise coordination with ground control to ensure the new joint was properly installed and tested. The repair was part of a planned maintenance schedule to sustain the arm’s functionality, which is vital for supporting scientific research and logistical activities aboard the orbiting laboratory.

Canadarm2, developed by the Canadian Space Agency, has been a cornerstone of ISS operations since 2001, enabling tasks ranging from satellite deployment to astronaut assistance during spacewalks. The wrist joint replacement addressed a gradual degradation in mobility detected during routine inspections, which could have compromised the arm’s ability to perform complex maneuvers. Williams and Meir worked methodically in the vacuum of space, utilizing specialized tools and tethers to secure the new component. The successful completion of the EVA underscores the importance of regular maintenance in ensuring the ISS remains a functional platform for international collaboration in low Earth orbit.

The spacewalk concluded with the confirmation that the upgraded wrist joint operated within expected parameters, allowing the robotic arm to resume its full range of motion. With the repair completed, the ISS crew can continue leveraging Canadarm2 for upcoming missions, including the arrival of commercial cargo resupply vehicles and potential scientific experiments. The operation highlights the ongoing reliance on human ingenuity and engineering precision to sustain long-term human presence in space.