SpaceX IFT-12 Post-Flight Analysis Complete — Raptor 3 Outer Ring Fuel Conditioning Anomaly Identified; IFT-13 Confirmed Late June with Booster 20 + Ship 40

Two days after Starship IFT-12 Block 3's historic debut flight on May 22, 2026, SpaceX engineers completed preliminary post-flight analysis of Booster 19's off-nominal boostback burn. The root cause was identified as a fuel pre-conditioning anomaly in the outer ring of the Raptor 3 propulsion cluster: during the rapid boostback ignition sequence, several outer-ring Raptors failed to ignite due to inadequate methane inlet conditions specific to Raptor 3's redesigned propellant manifold (which differs from Raptor 2's V2 architecture). Booster 19 subsequently impacted the Gulf of Mexico at approximately 1,450 km/h rather than achieving a controlled splashdown. SpaceX determined the anomaly is fully understood and correctable through revised pre-ignition chill-down sequencing before IFT-13. Despite the booster loss, SpaceX declared IFT-12's primary objectives fully met: the first-ever in-space Raptor Vacuum engine relight (a critical capability for orbital refueling and interplanetary missions), Ship 39's successful Indian Ocean splashdown, deployment of 22 Starlink mass-simulators demonstrating V3 cargo capability, and heat-shield performance imagery from two observer satellites. IFT-13 was confirmed to use Booster 20 (second Block 3 Super Heavy) and Ship 40 (second V3 Starship), both in advanced integration at Starbase. Target launch window for IFT-13 is approximately late June 2026 from OLP-2 at Starbase. IFT-13 objectives are expected to include a Mechazilla tower catch attempt for Booster 20 (if revised boostback sequencing validates), extended in-space Ship 40 operations profile, and continued heat-shield validation for NASA's Artemis 4 Human Landing System certification. The post-flight analysis was published by SpaceX on its public updates channel and covered in depth by NASASpaceFlight.com in a follow-up article titled 'Following Starship V3 debut, SpaceX prepares for follow up.'