The Federal Aviation Administration has ordered SpaceX to conduct a formal investigation into the failure of the Starship Super Heavy booster during the company’s May 22 test flight, a decision that effectively halts further launches of the giant rocket system and casts uncertainty on SpaceX’s timeline ahead of its anticipated initial public offering. The FAA confirmed the mishap determination in a statement on Wednesday, noting that the incident involved the booster as it attempted to return to the Gulf of America after separating from the upper stage. No injuries or damage to public property were reported, but the failure represents a significant setback for the first flight of the heavily upgraded Starship V3 configuration.
The booster failure occurred just minutes into the mission, designated Starship Flight 12, which was the first to feature the company’s third-generation vehicle architecture. After a successful ascent through maximum dynamic pressure and into space, the Super Heavy booster separated from the Starship upper stage as planned. However, when the booster ignited its engines for the sustained return burn intended to guide it back toward SpaceX’s launch site in South Texas, it experienced what appeared to be an immediate engine failure. Evidence from the flight suggests that a single engine failure cascaded into a series of failures, causing the booster to lose control and tumble downward before most likely exploding upon impact with the water.
SpaceX has not yet commented on the FAA’s order, and the company did not respond to a request for comment. The investigation will be led by SpaceX but overseen by the FAA at every stage. The agency will also need to approve SpaceX’s final report, including any corrective actions, before the company can resume Starship launches. This regulatory requirement all but eliminates the possibility of another Starship test flight before SpaceX’s IPO, which the company has signaled could come as early as mid-June.
What Caused the Super Heavy Booster to Fail on Starship Flight 12
The core mechanical question at the center of the investigation is why the Super Heavy booster’s return burn failed so catastrophically. During the May 22 flight, the booster separated cleanly from the Starship vehicle, but it immediately encountered trouble when attempting the sustained burn necessary to reverse its trajectory and fly back to the staging area. Telemetry data indicates at least one Raptor engine failed to ignite or lost thrust moments after ignition, and the flight control system was unable to compensate. The loss of thrust destabilized the booster aerodynamically, leading to an uncontrolled tumble and a high-velocity impact with the Gulf of America.
The FAA’s statement characterized the event unequivocally as a mishap, a legal designation that triggers mandatory investigation procedures. SpaceX is required to identify the root cause of the engine failure, determine whether design flaws in the V3 booster contributed to the cascade, and propose corrective actions. Given that the booster was flying with third-generation Raptor engines for the first time, the investigation will likely focus on whether the engine redesign introduced new failure modes that were not caught in ground testing.
Starship Itself Suffered an Engine Failure After Separation
The booster was not the only element of the vehicle that experienced trouble. After separation, the Starship upper stage lost one of its six Raptor engines. While Starship continued to fly and maintained attitude control, the loss of an engine forced SpaceX to abort one of the mission’s primary test objectives: performing a sustained burn in orbit. That maneuver was intended to demonstrate Starship’s ability to execute the kind of orbital insertion thrust profile required for operational missions, including Starlink satellite deployment. The engine loss during the upper stage further underscores the reliability challenges SpaceX faces as it transitions to the V3 platform.
Why the V3 Starship Was Supposed to Be More Reliable
SpaceX introduced the V3 Starship with the explicit goal of improving reliability and reusability over the previous 11 test flights. The V3 architecture incorporates a redesigned Super Heavy booster structure, entirely new third-generation Raptor engines, and upgrades to the Starship vehicle itself. The company intended for these changes to address known failure points from earlier flights, particularly around engine performance and thermal protection. The May 22 flight was the first integrated test of all these upgrades simultaneously, which means the root cause of the booster failure could lie in any of the new subsystems or in how they interact under real flight conditions.
SpaceX’s development philosophy has always embraced rapid, iterative testing in which failures are expected and treated as data. The company routinely states that it intends to break things in the process of learning how to build a fully reusable super-heavy-lift rocket. However, the stakes for V3 are higher than they were for earlier iterations. The company’s IPO filing, which was made public in late May, explicitly ties SpaceX’s long-term financial viability to Starship achieving high reliability and rapid reusability. Starlink, SpaceX’s primary revenue generator and its only profitable business, depends on Starship to launch the next generation of satellites at a scale and cost that Falcon 9 cannot match.
What is the relationship between Starship reusability and SpaceX’s IPO? The IPO filing makes clear that SpaceX’s valuation and growth trajectory are deeply linked to Starship becoming operational and reusable. Without Starship, the company’s ability to expand Starlink’s capacity and reduce per-satellite launch costs is severely constrained. The May 22 failure, coming so close to the IPO, introduces uncertainty about the timeline for Starship reaching operational status. Investors will now have to weigh the regulatory risk of extended grounding against SpaceX’s track record of recovering from failures.
The FAA has ordered multiple mishap investigations over the course of Starship’s development, reflecting the agency’s heightened scrutiny of the largest rocket ever built. Each prior investigation has resulted in corrective actions and modifications before the FAA cleared SpaceX for the next flight. The repeated investigations are not unusual for a program of this scale and risk profile; the FAA also ordered Blue Origin to conduct mishap investigations during the development of its own heavy-lift rocket, New Glenn. Just last week, the FAA cleared New Glenn to fly again after its most recent grounding.
What Happens Next for SpaceX’s Starship Program
SpaceX must now complete a root-cause investigation, develop corrective actions, and submit a final report to the FAA. The FAA will review the report and, if satisfied, issue a determination that allows SpaceX to resume launches. This process typically takes weeks to months, depending on the complexity of the failure and the adequacy of SpaceX’s proposed fixes. Given that the May 22 failure involved both the booster and the upper stage, the investigation is likely to be comprehensive, potentially extending the grounding beyond the immediate IPO window.
Blue Origin’s experience with New Glenn provides a relevant benchmark. The company was grounded for approximately six months after its first test flight ended in a booster failure. SpaceX has historically moved faster through investigations than its competitors, partly because of its in-house manufacturing capacity and extensive test infrastructure. The company can iterate on hardware while the investigation proceeds, which could shorten the time between grounding and reflight relative to industry norms.
The competitive implications of the grounding extend beyond SpaceX’s own timeline. Blue Origin is expected to perform the fourth New Glenn launch attempt within the next month, which would put it in a position to demonstrate reusability ahead of Starship. The race between the two super-heavy-lift rockets has implications for national security launch contracts, commercial satellite deployment, and NASA’s Artemis program, which depends on Starship for crewed lunar landing missions. A protracted grounding of Starship could shift the competitive balance, at least in the near term.
SpaceX’s broader development strategy remains unchanged. The company has already begun assembling the next Starship vehicle at its Boca Chica facility in South Texas, and it continues to conduct ground tests of the third-generation Raptor engines. The outcome of the FAA-mandated investigation will determine whether those assets can be flown within weeks or months. For now, the Starship program is in a holding pattern, waiting for answers that only a thorough engineering investigation can provide.
