Technical Issues Launch Delay Propulsion System Delays Test Flight Thruster Issues Helium Leaks Crewed Flight Issues Crewed Mission Challenges Astronauts Mission Delays Helium Leak Launch Competition Crewed Flight Test Mission Details Future Missions Astronaut Launch Return Mission International Space Station Launch Details Setbacks Launch Attempt Service Module CST-100 Starliner Crew Flight Test Crewed Launch Launch Delays NASA Collaboration Starliner Mission Details Commercial Spaceflight Boeing Starliner's first-ever astronaut mission NASA Mission Progress Live Coverage Upcoming Events Design and Testing Leak Detection Leaks Astronaut Activities Background Information Docking Issues Reaction-Control Thruster Malfunction Docking Redesigns Propulsion Issues Astronaut Flight Return to Earth Certification and Market Availability Return Delay Mission Issues Certification Process Astronaut Missions Program Challenges Astronaut Preparations Test Mission Safety Demonstration System Analysis Programme Issues SpaceX's Crew Dragon Space Station Response Comparison Safety Return Trip Equipment Problems Testing and Investigations Preparations for Return Astronauts aboard Thruster Failure NASA Decisions Astronaut Mission Fueling Process Safety Concerns Technical Difficulties Crewed Test Launch Development Challenges Commercial Space Travel Crew Members Comparison with SpaceX Dragon Future Plans Starliner Crew Test Flight Human Space Travel Future Prospects Crewed Test Flight End-to-End Testing Test Flight Mission Development Process Safety Issue Valve Problem Rocket Issue Development History Faulty Rocket Valve Comparison with SpaceX Starliner Capsule Starliner Delay NASA Mission Reaction Control Thrusters