In a high-stakes operation that could have ended in catastrophe, astronauts have safely re-entered the International Space Station after a nail-biting spacewalk to repair a critical air leak. The leak, which sources confirm was traced to a faulty seal in the Russian Zvezda module, threatened to deplete the station's oxygen supply within 48 hours. British engineers at the European Space Agency's ground control in Harwell devised a patch using a custom-fit polymer gasket, flown up on a hastily arranged Progress cargo ship.
The repair was executed by NASA and Roscosmos crew members, who worked in tandem with UK-based engineers guiding them through the procedure. 'It was a close call,' a source told me. 'If that patch hadn't held, we would have been looking at an evacuation scenario.
' The leak had been detected three days ago when pressure sensors showed a steady drop. Initial inspections failed to locate the source, but a team at Harwell analysed telemetry data and identified the exact point of failure within hours. Their solution: a gasket made from a new composite material that could withstand the temperature extremes of space.
The astronauts applied it in a four-hour spacewalk, with the British team talking them through each step. The patch held, and the crew are now back inside, with pressure levels stabilising. The cost of the operation has not been disclosed, but documents suggest the gasket was produced at a fraction of the cost of a full replacement seal, a fact that will factor into ongoing investigations into how the original seal failed.
Questions are being asked about maintenance protocols and whether the leak was a result of ageing infrastructure or something more sinister. One thing is clear: British ingenuity saved the day, but the crisis has exposed the fragilities of the orbital outpost. Sources say a full review of all seals and joints is now underway, with UK engineers taking a lead role.
