Despite polling “go”, there is one open item that must be closed out before Crew-3 can launch. During the Inspiration4 mission, a urine tube came unglued from the waste tank, which allowed urine to get into the fan system. While this had no impact on the Inspiration4 crew, teams have addressed the problem.
SpaceX welded the tube to the waste tank so it can no longer disconnect. SpaceX has completed all structural analysis and testing of the new design and has sent the data to NASA, which still has to complete its review; once they deem the fix as safe, they will close out the issue.
The fact that teams polled “go” even with this open item is a show of confidence in the reviews so far and an indication that this issue will be fully wrapped up at the L-2 day Launch Readiness Review.
After noticing this problem on Inspiration4, SpaceX and NASA teams decided to check the Crew-2 Dragon, Endeavour. They found that that urine tube had also disconnected on
Endeavour and had leaked under the floor. However, this problem had not been noticed earlier as Crew-2 only relies on the Waste Management System (WMS) on-board Dragon during free-flight, using the station’s WMS during all other portions of the mission. However, as Inspiration4 used Dragon’s WMS for all three days of its flight, the problem was more apparent.
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