The International Space Station, a facility continuously occupied since 2000, is dealing with escalating hardware degradation. On Friday morning, NASA instructed astronauts aboard the orbital laboratory to take shelter inside their docked SpaceX Dragon spacecraft following a sudden worsening of an ongoing air leak in a Russian module.
The emergency safe haven protocols were initiated at 9:04 a.m. ET out of an abundance of caution. By Friday afternoon, NASA lifted the shelter order, according to the Guardian, allowing the crew to return to standard operations after the Russian space agency, Roscosmos, paused its repair efforts to evaluate new measurement data.
The problematic air leaks are concentrated in the transfer tunnel, known as PrK, of the Russian-built Zvezda service module. While the module has experienced micro-fractures for years, the situation escalated recently. The station’s air loss jumped from one pound to two pounds per day, forcing the accelerated repair attempt and directly impacting the Crew-12 astronauts affected.
The ongoing structural uncertainties have also changed upcoming flight schedules. NASA delayed the private Axiom-4 mission to June 19 to further assess the integrity of the station before allowing new visitors on board.
How the Zvezda Module Leaks Complicate the ISS Timeline
The cracks in the Zvezda module have been a persistent issue since 2019. This latest escalation to a two-pound daily air loss highlights the growing physical maintenance hurdles facing a structure that has operated in a vacuum for over two decades.
The delay of the Axiom-4 mission shows how localized hardware failures in the Russian segment now dictate the operational capacity of commercial American flights. Roscosmos is currently evaluating the new measurement data before scheduling any further structural repairs.