NASA has wrapped up its inquiry into the 2024 Starliner incident that left two astronauts marooned in space for nine months.

On Thursday, the agency classified the event as a ‘Type A’ mishap, its most serious level of mission failure. This designation places the Starliner test flight on par with the Challenger and Columbia tragedies, both of which resulted in the loss of 14 lives.

Sunita Williams and Butch Wilmore were sent to the International Space Station (ISS) in July 2024 for a planned eight-day visit. However, a malfunction in the capsule rendered it unfit for safe human travel, compelling NASA to bring the spacecraft back to Earth and leaving the astronauts on the ISS until March of the following year.

NASA administrator Jared Isaacman commented, “Errors were present from the start of the program and persisted throughout its execution, encompassing contract management, oversight, technical rigor, and leadership decisions.”

“Boeing constructed the spacecraft, and NASA gave its approval for variances from the beginning, agreeing to proceed with the flights,” Isaacman continued. “As the project advanced, design concessions and insufficient hardware validation extended beyond NASA’s full comprehension.”

The investigation uncovered both technical and organizational shortcomings that compromised the mission’s safety and oversight.

Decisions and pressures before and during the flight contributed to a culture that sometimes prioritized schedule over caution. 

After the mission, concerns about reputation delayed the formal declaration of a mishap, and the program initially conducted its own review. 

The Starliner launched Sunita Williams and Butch Wilmore to the International Space Station in July 2024 for what was intended to be an eight-day stay

The capsule malfunctioned, making it unsafe for human travel and forcing NASA to return it to Earth, leaving the astronauts stranded on the ISS until March last year

Starliner, developed under NASA’s Commercial Crew Program since 2010 to ensure continuous American access to low Earth orbit, faced a series of technical setbacks before its first crewed mission. 

Early test flights, including Orbital Flight Test (OFT) 1 in 2019 and OFT-2 in 2021 and 2022, suffered guidance errors, thruster failures and oxidizer valve malfunctions, with investigations often addressing only immediate causes rather than underlying issues. 

The crewed test flight in June 2024 encountered multiple propulsion anomalies, thruster failures and a temporary loss of full control during docking operations. 

The launch took place under the Biden Administration. 

Despite these challenges, the astronauts remained safe aboard the ISS, Isaacman said. 

Starliner returned autonomously to Earth in September 2024 without crew, and Wilmore and Williams were later brought home safely by SpaceX Crew-9.

The report noted that engineering variances are common across major aerospace programs, but NASA found that Starliner’s qualification deficiencies made it less reliable for crew survival. 

The agency acknowledged that it managed the contract, accepted the spacecraft, launched the crew and made critical decisions from docking through post-mission operations, placing a significant portion of responsibility on itself.

The investigation identified both organizational and technical factors contributing to the mishap, though the precise causes of the service and crew module thruster anomalies remain under review. 

The American space agency labeled the incident a ‘Type A’ mishap, the most severe classification of mission failure, and the same as the Challenger disaster

NASA’s limited oversight, according to Issacman’s report, left the agency without full insight into spacecraft systems, while Boeing’s propulsion design operated beyond safety qualifications. 

Additionally, NASA’s desire to maintain two competing crew transportation systems influenced risk and operational decisions throughout the mission.

Pre-launch, more than 30 scheduled attempts created schedule pressure and decision fatigue, and prior thruster risks were inadequately addressed. 

On-orbit disagreements over crew return options led to unprofessional conduct, while advocacy for the Starliner program often overshadowed safety priorities, the report said.

Post-mission, despite a severe loss of control and costs far exceeding Type A thresholds, a mishap was not initially declared due to concern for program reputation, and the Commercial Crew Program first investigated itself.

The independent investigation concluded that these decisions were inconsistent with NASA’s safety culture. 

The agency has now formally designated the flight a Type A mishap to ensure lessons are captured for future missions. 

Officials emphasized that program advocacy had exceeded reasonable bounds, placing the mission, crew and America’s space program at risk, and pledged leadership accountability to prevent such a culture of mistrust from recurring.