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SpaceX Says Helium Loading Issue May Have Caused Falcon 9 Explosion (arstechnica.com) 38

An anonymous reader quotes a report from Ars Technica: Nearly two months after a September 1 accident on the launch pad, SpaceX says it is nearing the conclusion of its investigation. Although the company has yet to identify the "exact root cause" of the accident that occurred during a static fire test just prior to a planned launch of a communications satellite, the investigation has reached an "advanced state." Shortly after the fiery incident, the company focused on a breach in the cryogenic helium system of the rocket's upper stage liquid oxygen tank. "Attention has continued to narrow to one of the three composite over-wrapped pressure vessels (COPVs) inside the LOX tank," the company stated in an update released Friday afternoon. "Through extensive testing in Texas, SpaceX has shown that it can re-create a COPV failure entirely through helium loading conditions. These conditions are mainly affected by the temperature and pressure of the helium being loaded." SpaceX intends to continue work to identify the precise cause of the accident and to improve its method of loading helium onto the rocket to prevent a repeat failure. The company also plans to resume testing Falcon 9 rocket stages at its facility in McGregor, Texas, soon. By taking this step in early November, SpaceX maintains that it is on track to resume flight operations of its Falcon 9 rocket before the end of 2016.
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SpaceX Says Helium Loading Issue May Have Caused Falcon 9 Explosion

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