ShyTorque do you think this kind of helicopter has so little 'weather cocking' that it would go to 90 degrees from the cruise? Difficult to believe
Yes. If the tail rotor drive fails, anything might happen unless the correct immediate actions are taken.
Regarding the Wessex accident mentioned, I do know for a fact that RAF crews did not receive detailed simulator training for tail rotor malfunctions on that type (I flew it early in my career). I later became one of the staff who were tasked to develop a full motion sim. syllabus for training RAF helicopter pilots how to deal with T/R malfunctions on another type. Unfortunately there was no simulator that could be used for the Wessex and no interest, probably because the aircraft was approaching the end of its service life.