Re: I guess (Boing should know better)
This is not the first 737 problem. Saw about this on a Modern Marvels rerun.
https://en.wikipedia.org/wiki/Boeing_737_rudder_issues
Took two crashes to get it figured out. Just not as close together (3 years between crashes) so I don't think they grounded the planes. And I think there was a workaround for the pilots if they knew it was happening.