> They spend their century maintaining/creating some of the best work on the planet but when they disappear, unenumerable amount of knowledge, tips and experience silently disappears as quickly as it was gained, and it's sad to observe every single time.

Every single possible airplane maintenance operation is detailed on task cards that mechanics follow. Probably there is some small amount of tribal knowledge, but virtually everything is documented with step-by-step procedures, which includes the tools you need, every step, all torque values, etc.

It’s not like being an electrician or pipefitter where you have to make your pipe or conduit get from point A to point B by following the construction code, airplane safety is crucial enough that documenting and standardizing airplane maintenance was done long ago.