Originally Posted by
gulliBell
No they don't. TR control malfunction you should still be able to land the helicopter at a place of your own choice, without any particular urgency, and without putting a scratch on the aircraft. TR drive malfunction is far more serious, with far less options available, which can very quickly lead to loss of control.
I would tend to disagree. A TR Servo problem could include an uncommanded full input in either direction, which is the equivalent of applying full yaw pedal - which is very much like what we see in this incident. I fail to see how that can be considered 'controllable'. The S92 referred to earlier may have had a similar outcome if not a few feet above the deck.