Aircraft Mechanics do not do shoddy work.
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Here’s a perfect example of a mechanic doing shoddy work. Must be part of the conspiracy.
https://en.wikipedia.org/wiki/Air_Midwest_Flight_5481
It is an example of a mechanic working on an aircraft without proper training on that aircraft.
For all we know, his work was excellent. He may have set the cable tension perfectly, but for a different sort of airplane.