"But the computer said it can't happen."
This is the generation that is growing up with computers.
I was just cringing waiting for this to happen when they couldn't figure out the cause of the first fires.
I know the problem from trying to fix what we call heisenbugs in software. Some of the stuff is a real pain to trace so you start kind of working with what you can reasonably work with and you hope it just goes away. Of course it never goes away until you really, truly, find out what's going on.
I hope this was just something stupid on this airplane and not the same problem again. If it's a repeat, these will not fly again until the cause is found and that could be a year.