Would have upvoted except for that last sentence. There is no such thing as a perfectly good airplane, at least as long as "perfect" means flawless rather than

Would have upvoted except for that last sentence. There is no such thing as a perfectly good airplane, at least as long as "perfect" means flawless rather than good enough. Granted, there is a whole dance for accepting the risk from known defects (that's the whole point).