NASA’s SpaceX Crew-8: Unspoken Aspects of Their 235-Day ISS Mission

NASA Spacewalk Terminated Due to Spacesuit Cooling Leak

Incident Overview
On June 24, 2024, a planned spacewalk by NASA astronauts Tracy C. Dyson and Mike Barratt was cut short due to a water leak in Dyson’s spacesuit cooling system.

The Leak
The leak occurred when Dyson switched her spacesuit to battery power, shortly after opening the hatch to the International Space Station’s airlock. Water began flowing from the service and cooling umbilical unit of her suit, prompting an immediate response to ensure safety[3][5].

Safety Measures
Despite the drama, the astronauts were not in danger. Barratt helped close the airlock hatch by using Dyson as a lever, allowing them to repressurize the airlock. This swift action followed established procedures and prevented further complications[3].

Cause of the Leak
The leak was attributed to a hardware issue, specifically a poppet valve on the interface that failed to seat properly. The solution involved changing out the entire umbilical unit[3].

Impact on Space Station Activities
Following the incident, NASA’s focus shifted to other tasks, including experiments, the arrival of a new cargo ship, and testing Boeing’s Starliner crew capsule. The spacewalk, which was not urgent, was postponed until a later date, possibly January, with a different set of astronauts[3].

Spacesuit Condition
The current spacesuits on the International Space Station are decades old, with designs dating back to the space shuttle era. While Barratt is confident in their functionality for the next spacewalk, he acknowledges that repeated use without upgrades will likely result in more hardware issues. Efforts to develop new spacesuits have faced setbacks, including Collins Aerospace dropping out of a NASA contract in June 2024[3].