> The fact that this issue is present in the existing 737 Max variants, and none appear to have actually experienced a structural failure, suggests the probabil

> The fact that this issue is present in the existing 737 Max variants, and none appear to have actually experienced a structural failure, suggests the probability is low. The fact that the space shuttle flew 60 times without SRB o-rings being a problem suggests that the probability of their failure was also low.