Hi 500e
I take it that you are referrring to the S92 MGB oil filter. I take your point. However if the problem is addressed which it appears to be what more can we expect. I note that the Allison 250 engine also suffered from oil filter stud failures in the late 70's early 80's and this was designed out. As for the S76 servo failures as far as I can see they have not been the result of design error but of manufacture or repair failings. The idea that a single failure should not lead to the loss of an aircraft just doesn't seem to hold up against any design out there. As long as we have mechanical linkages we will have a problem,
fly by wire may resolve a lot of these issues but if you lose a blade what then?
I feel that the idea of a helicopter with total redundancy of systems is a long way off.