This removes a repeat-failure risk that previously destroyed the first V3 booster and allows SpaceX to proceed with final integration work (installing 33 Raptor engines and grid fins) on the vehicle slated for the next Starship flight. The milestone effectively shifts the critical path from tank/structure validation to engine installation and pad readiness, tightening the timeline to a launch-ready stack once engine fit-checks and acceptance testing are complete. It also provides the first full-duration stress-cycle data on the V3 booster’s redesigned tanking architecture, informing whether additional design rework is needed before subsequent V3 boosters enter the test flow.