"regular governor-off refresher training sounds like a very good idea, and perhaps should be part of the annual LPC"
It is where I fly. We also do a new thing on R22 and R44 - the testers pull the tacho cb as a surprise. This is related to a recent incident where a 44 was flying along happily and the tacho dropped to zero. So, the pilot decided to immediately auto. He landed hard and chopped the tail off.
Turned out there was nothing wrong with the engine. The tacho needle/spindle had failed...........
So - might be a good idea to check all pilots for hearing........generally speaking, if the cylinders sound intact, the rotor rpm OK. the airspeed is OK and the VSI isn't diving - you'd think anyone with even half a brai...........sorry. I'll stop. Don't want to get banned.