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A comment on The James Webb Space Telescope – making 300 points of failure reliable. Parent comment

Re:The James Webb Space Telescope – making 300 points of fai... by turrican on Sunday January 09, 2022 @04:17PM (#29867407)
https://www.aopa.org/news-and-media/all-news/2018/may/16/nts...

Not as small of a risk as you’d expect (though not anything to seriously worry about). This metal fatigue grounded a large chunk of the US training fleet and similar cracks were frequently found in other Piper Arrows (including ours).

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Re:The James Webb Space Telescope – making 300 points of fai... by voldacar on Sunday January 09, 2022 @04:45PM (#29867618)
That is actually kind of scary.

How many cycles does the airframe have to go through in order for this to become a problem? I tend to think that if the FAA gave a shit about general aviation maybe we wouldn't be flying planes from the 1960s

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Re:The James Webb Space Telescope – making 300 points of fai... by WalterBright on Sunday January 09, 2022 @05:25PM (#29867938)
For airliners, the airplanes are retired after a certain number of cycles. The 757 was designed for 62,000 flying hours, if I recall correctly. It's scrap after that.

My dad's B-17 in WW2 was scrapped after 30 missions, it was considered worn out.

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