Interesting. He pretty much confirms what I'd guessed, that reduction gearboxes are the weak links in helicopter design.
AdamFrisch-
If "gearboxes are the weak link in helicopter design", why do most modern rotorcraft still use 2 (or even 3) turboshaft engines, at least 2 separate hydraulic systems, at least 2 separate electrical power bus circuits and generators, at least two sets of pilots and controls, etc., but only a single MRGB?
Blaming a mechanical system for problems with rotorcraft is what one would expect from an electrical engineer. The reality is that the MTBF record of any current rotorcraft gearbox is far better than that of any rotorcraft electrical system.