Technical Issues Launch Delay Propulsion System Delays Crewed Mission Test Flight Crewed Flight Thruster Issues Issues Helium Leaks Competition Mission Delays Launch Crewed Flight Test Helium Leak Challenges Astronauts Service Module Launch Attempt CST-100 Starliner Crew Flight Test Setbacks Launch Details International Space Station Return Mission Crewed Launch Astronaut Launch NASA Collaboration Future Missions Launch Delays Mission Details 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 Testing and Investigations Preparations for Return Astronauts aboard Thruster Failure NASA Decisions Rescue Operations 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 Equipment Problems Starliner Delay NASA Mission