A plumbing issue on a rocket engine has forced a postponement in the first launch of NASA’s most powerful rocket on a history-making round-the-moon flight.
NASA’s Space Launch System rocket went far into the fueling process for today’s start of the uncrewed Artemis 1 mission, which is meant to test all the systems that will come into play during crewed missions to the moon.
During the countdown, engineers detected a problem with one of the core stage’s four rocket engines. The rocket is designed to “bleed off” some of its supercooled propellant to condition its engines — basically, to maintain the engines at the proper temperature for startup. But the hydrogen bleed procedure wasn’t working properly for engine No. 3.
Engineers tried various techniques to free up the plumbing snag, and NASA called an unplanned hold at T-minus-40 minutes to give them more time to come up with a fix. But in the end, mission managers decided to scrub the launch for today.