As someone who has spent several decades trying TRYING to teach the British how to use nuts and bolts, I have been concerned about both of the fastener problems that have been highlighted on the S-92 box.
The oil filter stud problem indicated a very poor decision about materials.
I am aware of the main gearbox mounting bolt problem but I don't know any of the detail. I would be grateful if someone can direct me to documents with more detail about that failure.