Leak Halts Third Attempt To Fuel SLS

Signs of venting (in yellow circle) from SLS main engines during liquid oxygen loading.
Credit: NASA TV
CAPE CANAVERAL—A hydrogen leak halted NASA’s third attempt to fuel the first Space Launch System (SLS) rocket at the launchpad on April 14. The leak, located in the SLS mobile launcher (ML) tail service mast umbilical (TSMU), was detected as the launch team transitioned from slow- to fast-fill of...

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