Nubian,
I did make it clear that I was drawing attention to:
.....moving parts of any machine are likely to be subject to accelerated wear if they are operated in these conditions of contamination
I wasn't suggesting that these components will suddenly fail.
The purpose of my first post was to draw attention to those flying so called 'immune' piston powered helicopters (and everyone else, whatever they fly) that unusual rates of wear to other parts of their helicopters may occur if they fly in alleged contaminated air.
(In the 36 years of my career as a helicopter LAE, I have been involved in crop spraying & desert operations in E. Africa and Morocco. I know a little bit about abrasive operating environments)