Palma - that is exactly what Jellycopter is talking about - it wasn't a TR failure, it was a loss of TR control.
It is straightforward, with a TR failure, the TR is producing no thrust in any direction and probably not turning at all. With a TR control failure, the TR is still turning and may be producing thrust one way or the other, depending on the nature of the failure, or none at all if it has gone to flat pitch.