Last year we had a creeping failure on our 206. You could feel it starting to fail. If you moved the controls fast you would feel resistance. If you moved them slowly you maintained pressure. The problem was that after we had changed various components we thought we had fixed it. But no. It would come out of nowhere. Nothing quite like a hydraulic failure coming off or landing on our mix truck for ag work. We finally ended up changing out the quick release couplings and that cured the problem.
None of the above is written in the flight manual either......
As for wires. Had a few close calls, but so far have not hit any.