NASA SpaceX Delay Crew-13 Mission Over Dragon Oxidizer Leak

The National Aeronautics and Space Administration (NASA) and Space Exploration Technologies Corp. (SpaceX) have postponed the Crew-13 mission to the International Space Station (ISS) following the discovery of an oxidizer leak in the Dragon spacecraft’s propulsion system.

In a press release issued on August 29, 2026, NASA confirmed the delay, which pushes the launch past its original September 12, 2026, target date. The mission, launching from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida, will carry four astronauts to join Expedition 75. A new launch date remains pending while joint engineering teams evaluate the spacecraft hardware.

Prelaunch processing and hardware evaluation

The oxidizer leak was detected during standard prelaunch spacecraft processing. NASA spokesperson Joseph Zakrzewski stated the agency and SpaceX are adjusting the schedule specifically to address the propulsion system anomaly before clearing the vehicle for flight.

Engineers are currently assessing the spacecraft to determine the required corrective actions. The timeline for the mission’s progression depends entirely on the resolution of the hardware issue.

“Joint NASA and SpaceX teams are performing additional tests and data review and will complete any necessary rework prior to launch. A new target date will be announced once available,” Zakrzewski noted.

Crew-13 mission profile and historical context

The Crew-13 roster includes NASA astronauts Jessica Watkins (Commander) and Luke Delaney (Pilot), alongside Mission Specialists Joshua Kutryk of the Canadian Space Agency (CSA) and Sergey Teteryatnikov of the State Space Corporation ROSCOSMOS (Roscosmos). The crew was scheduled to enter quarantine at the Johnson Space Center in Houston approximately two weeks prior to the original launch date.

SpaceX has previously addressed oxidizer-related issues on the Dragon platform. In April 2019, a liquid oxidizer leak involving nitrogen tetroxide entering high-pressure helium tubes resulted in an explosion during a ground test of the spacecraft’s SuperDraco abort thrusters. The company subsequently redesigned the system to mitigate similar risks.

AirPro News analysis

While launch delays are routine in orbital spaceflight, propulsion system leaks require rigorous scrutiny due to the highly reactive nature of spacecraft oxidizers. The detection of this leak during standard processing validates the pre-flight checkout protocols established by NASA and SpaceX under the Commercial Crew Program. We expect the engineering teams will thoroughly trace the leak’s origin to determine whether it stems from a localized component failure or a broader systemic issue before committing to a revised launch schedule.

Sources: NASA