you are operating in a region of flight not all that many folks do.
if any with a heavy pendular load?
good one sasless, been waking up at night trying to nut this out, as you can see.
I wonder if you might be experiencing LTE
I wonder could the T/R have been intercepting some rather unusual turbulence at that point as well from the retreating blade, breaks away, then as you say rolls right?
just a thought.
did the T/R break away as well Fijdor?