Falcon 9 Block 5 flight F355 used launch article 355/B1063.19 for the Starlink-181 mission on 2024-07-12. A liquid-oxygen leak in the second stage prevented the planned Merlin Vacuum restart and orbit circularization. The satellites were deployed into an unsustainably low orbit and reentered, making this a partial launch failure despite nominal first-stage performance and recovery.