Share the news of August 5 with wechat scanning code QR code < / P > < p > to friends and circles of friends < / P > < p > late Wednesday local time, NASA and Boeing revealed that the Starline spacecraft and booster will be moved from the launch pad to the vertical integration facility on Thursday local time, and Boeing will take the lead in necessary inspection < p > it is reported that the previous unmanned flight test oft-2 mission of Boeing Starline spacecraft was cancelled because the sensor showed an error in the status of a valve on the spacecraft. Boeing has "eliminated some potential causes, including software failures". After the spacecraft enters the facilities near the launch pad, Boeing will continue to "troubleshoot". Engineers and others familiar with the spacecraft speculate that it may need to be disassembled to determine what went wrong. They speculate that the new launch date may be delayed for several weeks < p > Boeing initially said that the lightning strike near the launch pad on Monday may be the root cause of the problem. However, according to people familiar with the investigation, it is unlikely to determine the cause when the spacecraft and booster are still standing on the launch pad. Some people said that the Starline spacecraft must be removed from the booster in order to carefully inspect the spacecraft components < p > Boeing later said that the storm "seems unlikely to be the cause, but the team will closely inspect the damage related to water or electricity." < p > NASA spokesman said: "after the problem is solved, NASA and Boeing will look for the next launch opportunity." < p > aerospace engineers who have nothing to do with Boeing or NASA say there is little chance that this problem can be solved this week < p > this is likely to delay the flight test by several weeks. The task team needs to find the root cause of the problem and then repair, assemble the parts and conduct safety testing < p > Boeing attributed the cancellation of the oft-2 mission to the sensor signal "indicating that not all valves are in the correct state required for launch". The company suggested that lightning was the cause of the problem, saying it was first discovered after a thunderstorm in the area where the Kennedy Space Center is located < p > a few days ago, poor weather conditions prompted ground personnel to move the Starline spacecraft from the launch pad to the interior. Sven bil é n, a professor of Aerospace Engineering at Pennsylvania State University, said the relevant valves may be used to control the direction of the spacecraft in space < p > he said: "in the spacecraft, if the valve fails, the spacecraft will not be able to move as planned, may not reach the space station, or burn down when returning to the atmosphere because of the wrong flight direction." < p > aerospace engineers say the problem seems complex. "If the valve is broken, it will take at least a few weeks to take it out and replace it," bil é n said“ If it is a problem with the sensor, it is easy to replace, "it may be able to re launch soon." But he added that people might be worried that "other valves have the same problem" < p > in addition, the launch site conditions, the space, weather and orbit conditions that the space station can dock will affect Boeing and NASA to redefine the launch date < p > for Boeing, it is very important to re launch the spacecraft as soon as possible. NASA has paid the company more than $4 billion to develop the Starline spacecraft and conduct flight tests. Now any maintenance costs will be included in the project expenditure（ Chen Chen) < / P > < p >