I am pretty sure you won't find 3 events where the big fan came off the top since 1980 for the two fleets combined.
The S76 has a similar head to the Blackhawk. So far the S76 has taken nearly 200 lives and I can remember three occasions where it was because of departing blades including one that I had flown the previous flight.
https://aviation-safety.net/wikibase...php?AcType=S76
There are a lot of 76s around, as there are 330/332/225s. It doesn't make one type more dangerous than the other.