A few days after NASA said it was preparing for the second static firing test of the core phase of the space launch system, NASA announced on February 22 that the test would be postponed due to valve problems.
The National Aeronautics and Space Administration stated that the Green Run static shooting test scheduled for February 25 was postponed after it was discovered that there was a problem with one of the eight valves “prevalves” related to the platform’s four RS-25 main engines. . The National Aeronautics and Space Administration said in a statement that the valve supplying liquid oxygen “is not working properly,” but did not elaborate on the problem.
The engineer discovered the problem during the weekend test preparations. NASA said it would work with Boeing, the general contractor of the core phase, to “determine the way forward in the next few days and reschedule the heat test,”
The valve problem is not the first time the Green Run test at the core stage has been delayed. In November, NASA reported a problem with the liquid hydrogen valve at the core stage, which required workers to design a special tool to repair the valve on the test bench. Coupled with the impact of the tropical storm passed by the Stennis Space Center in late October, the wet clothes rehearsal on the stage was postponed for several weeks, the stage was full of propellant and the countdown went through.
Three days after NASA and industry officials held a briefing, they announced the latest delays. They expressed confidence in their preparations for a static shooting test on February 25, which included overcoming the recent winter storms and abnormal cold. Problem with the weather at the Mississippi test site.
“The team has been working very hard in certain difficult situations. John Shannon, Boeing’s vice president and SLS program manager, said in the briefing: “We are moving towards number 25. “
At the same briefing, NASA officials stated that they remain cautiously optimistic that SLS can conduct the first unmanned flight of the Orion spacecraft before the end of this year-the launch of the Artemis 1 mission, despite the green running The test activity was delayed for a long time. Tom Whitmeyer, deputy director of exploration systems development at NASA headquarters, said that if all goes well, the mission may start in October, and then he admits that there may be problems along the way.
He said: “First of all, we really need to leave the fire behind,” he was referring to the “green running” static shooting test. “This is the most important thing before us.”