Following today’s scrubbed launch of the CST-100 Starliner spacecraft, Boeing is working to understand the source of the unexpected valve position indications in the propulsion system.
The issues were first detected during checkouts after electrical storms passed over Kennedy Space Center on Monday.
Engineering teams have now cycled the Service Module propulsion system valves with the Starliner and Atlas V on the launch pad and have ruled out a number of potential causes, including software. Additional time is needed to complete the assessment and, as a result, NASA and Boeing are not proceeding with tomorrow’s launch opportunity.
“We’re going to let the data lead our work,” said John Vollmer, vice president and program manager, Boeing’s Commercial Crew Program.
“Our team has worked diligently to ensure the safety and success of this mission, and we will not launch until our vehicle is performing nominally and our teams are confident it is ready to fly.”
Teams will power down the spacecraft this evening, and roll the rocket and spacecraft back to the Vertical Integration Facility on Wednesday for further inspection and testing to inform the next steps.