SpaceX is replacing 2 rocket engines for its next astronaut launch for NASA

Reassuring that a) the monitoring systems worked correctly and noticed the anomaly on two engines and aborted the launch b) the subsequent investigation was well conducted and identified the cause and c) steps have been taken to avoid the problem in the future. :)
 
Oct 23, 2020
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SpaceX is replacing two engines on the Falcon 9 rocket that will launch its next NASA astronaut mission after spotting a problem on an earlier launch.

SpaceX is replacing 2 rocket engines for its next astronaut launch for NASA : Read more
I assume that generations of Space X engines are the future. I bet that in some time they might replace all generations of NASA`s engines. Just have a look hove Space x technology succeeded for the short period of time. I wonder how up to date they are!
Merlin,Kestrel,Draco and of course SuperDraco. And now we are looking to the new engine Raptor.