https://aviation-safety.net/wikibase...ype=S61&page=1
There seem to be a lot of rotor failures in this list, dampers spindles and blades.
The most remarkable being the loss of a main rotor blade on 29/12/90 to KLM PH-NVK
I believe the aircraft shut down on a rig after vibration issues and the blade departed as the rotor was coasting down.