If youre looking for 100% mechanical reliablity then youre in the wrong job.
It will just be another AD like the other mechanical issues causing fatalities.
Remember when the blades were flying off the A109s and the mast were coming off Bell mediums, when Arriel 5 modules were blowing up on Astars, and Robbie blades had all the inertia of a balsa model. Tail rotor tip caps came off 500s and all pretty much of the LTS101s early history?
Its that sort of thing.