During it's early years the S76A shed main rotor blades due to spindle failures. I believe that at least one aircraft was also lost due to tail rotor cable failure. Hence the big mod to the bellcrank on the tail gearbox.
In the days when Bond operated 6 S76A's at one point they used to remove a pair of turbines from one aircraft every Friday night, send them to overhaul for a decoke and then refit them in time for monday morning.
Then they also had to armour the engine compartment in case of uncontained turbine failures. I recollect that mod weighed about 20 kilos.
The current fleet is now mature and maybe people have forgotten what a pain it can be to integrate a completely new type in the offshore environment.
The only aircraft I remember arriving quietly was the 365N, but that was on the back of the 365C which had operated for a number of years.