The approval will allow SpaceX to stay on schedule with its Crew-9 mission to rotate astronauts at the International Space Station (ISS), which NASA officials on Friday said is planned for no earlier than August 18.

Falcon 9 was grounded by the FAA following a rare mishap during a July 11 launch of Starlink satellites, its first failure after a streak of more than 300 successful missions.

SpaceX on Thursday shed more light on the incident. The company traced the anomaly to a cracked sense line that created a liquid oxygen leak within the rocket’s second stage engine. This caused ignition fluid to freeze, preventing the engine from performing a burn that would have placed the satellites in a circular orbit.

Despite the issue, SpaceX said, the engine continued operating as intended through both of its planned burns, but all 20 satellites were lost.

The FAA swiftly grounded Falcon 9 as is standard whenever a launch does not go according to plan. SpaceX submitted a mishap report on the night of the anomaly.

Steve Stich, manager of NASA’s Commercial Crew program, said Friday that “SpaceX went above and beyond” in its assessment of the issue, working with NASA to develop a fault tree, review spacecraft telemetry, analyze video, and search for similar issues on other Falcon models.

The company has opted to remove the faulty sense line, which is redundant and not a part of the spacecraft’s safety system, for near-term Falcon 9 launches. It also agreed upon several corrective actions with the FAA that will be detailed in the coming days.

The FAA must still give a final sign-off for Crew-9 to launch, but the blessing to return to flight should allow SpaceX to meet its mission timeline. Stich on Friday said Crew-9 will launch no earlier than August 18 from Launch Complex 39-A at Kennedy Space Center in Florida, with the launch window extending into September.

The mission represents the fourth flight of this particular Falcon. It will launch SpaceX’s Crew Dragon on its 45th mission to the ISS. Once onboard, four crewmembers will spend six months conducting a range of experiments, including studying the physics of neutron stars and the behavior of wildfires on Earth.

The ISS’ two docking ports are occupied by SpaceX’s Crew-8 Dragon capsule and Boeing’s Starliner, the latter of which will need to make way for Crew-9. Complicating matters, however, is the unexpected extension of Starliner’s inaugural crew flight test (CFT), which has left astronauts Butch Wilmore and Suni Williams aboard the orbital laboratory for nearly two months.

Sources told Ars Technica’s Eric Berger that NASA is considering sending Crew-9 to the ISS with only two astronauts, theoretically making room for Wilmore and Williams to hitch a ride home on SpaceX’s Dragon rather than Starliner.

The scenario is one NASA hopes to avoid. Officials stopped short of calling it a requirement for certification but said that returning the astronauts home on Starliner rather than Dragon is “important” to the program’s goals. According to Stich, teams have finished an approximately monthlong test of Starliner’s thrusters and are working toward a flight readiness review, expected toward the end of next week.

However, Stich also said that NASA has officially handed over the Starliner’s first mission—which was double booked for early next year—to SpaceX. The flight, Starliner-1, will be pushed to no earlier than August 2025, while Falcon 9 and Dragon handle the agency’s tenth commercial crew rotation in February. Starliner-1 will again be double booked with SpaceX Crew-11.

Though SpaceX’s Falcon woes haven’t derailed Crew-9, they may shake up NASA’s busy ISS manifest. The agency is working toward an August 3 launch of Northrop Grumman’s Cygnus, followed by an August 13 Roscosmos launch. Crew-9 would be next, followed by SpaceX’s Polaris Dawn mission, originally scheduled for this month.

Beyond that, NASA wants to make a Soyuz ISS crew exchange in September, launch the Europa Clipper probe in October, and facilitate the Axiom-4 private astronaut mission in November.

Given the rapid turnaround following Falcon 9’s rare mishap, Boeing’s Starliner may be a larger culprit than SpaceX in any future delays.

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Later this year, Space Force Colonel Nick Hague will pilot a NASA mission to the International Space Station (ISS) on NASA’s SpaceX Crew-9 mission aboard the Dragon spacecraft, the service announced. The mission will be the ninth rotation admission at the space station under NASA’s commercial crew program.

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“The core of our mission on the space station is to perform science experiments and collect data,” Hague said. “The [ISS] provides a unique platform in microgravity, which allows researchers from around the world to explore and discover processes that could have significant impact on the behavior of our bodies and the environment around us, both on Earth and off planet.”

The launch, scheduled for no earlier than August, is a history-making first for a Space Force Guardian but marks Hague’s second mission to ISS. In March 2019, Hague, who was then in the Air Force, began a 203-day mission at the space outpost, where he spent nearly 20 hours conducting spacewalks.

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Joining Hague on the Crew-9 mission will be Commander Zena Cardman, Mission Specialist Stephanie Wilson, and Roscosmos cosmonaut Mission Specialist Aleksandr Gorbunov. Once the crew arrives at the station, Hague will transition to a flight engineer role. The Crew-9 mission will then conduct a handover with NASA’s SpaceX Crew-8 mission, which is set to launch to the ISS no earlier than February 22. 

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“Being a part of this mission is a unique honor, but it’s truly a collective effort,” Hague said. “Guardians worldwide ensure safe and secure operations of critical systems for launch and on station. From GPS satellites that underpin our station navigation systems, to space domain awareness sites around the globe that help NASA prevent orbital debris from colliding with the space station, to the launch range that my crew will use when we lift off, Guardians provide critical support without which our NASA human spaceflight program wouldn’t be possible.”

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