This unaltered story was originally published by U.S. NASA Space Agency.
URL: https://www.nasa.gov
Content is in public domain.

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July 2015 – SpaceX

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Date: 2022-04 

SpaceX revealed early findings of its analyses Monday following weeks of intense evaluations and testing. The company said in part:

“Preliminary analysis suggests the overpressure event in the upper stage liquid oxygen tank was initiated by a flawed piece of support hardware (a “strut”) inside the second stage. Several hundred struts fly on every Falcon 9 vehicle, with a cumulative flight history of several thousand. The strut that we believe failed was designed and material certified to handle 10,000 lbs of force, but failed at 2,000 lbs, a five-fold difference. Detailed close-out photos of stage construction show no visible flaws or damage of any kind.”

To read the complete statement from SpaceX, go to http://www.spacex.com/news/2015/07/20/crs-7-investigation-update

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[1] Url: https://blogs.nasa.gov/spacex/2015/07/

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