Guys, sometimes things on airplanes just break. Things break on 60 year old airplanes more often than on 20 year old airplanes, but things still break.
I'll bet if you do a search, you'll find a gear collapse or two in the last few years on working airliners for major carriers.
What are you going to do? Magnaflux every single part before each and every flight?
Goes with the territory. If you want to see them fly, you're going to see some break.