Originally Posted by
AnFI
S92s 225s Merlins ec135 a109s all have multi engine related accidents often
No, they don't.
They do have accidents but they are rare and they have to do with very demanding Usage profiles rather than the question 1 engine or two or even more. In this particular case the second stage epicyclic that apparently failed could give a flying f*ck if the first stage gear was driven by one, two or three donks.
The thought you are a helicopter pilot thoroughly scares me, seeing that you have obvious difficulties understanding the most basic causal inferences.