I remember it well - even to this day. It was something the instructor showed us literally hours into flying a helicopter and it was very scarey.
Dive to near Vne (163kts I believe) and then pull firmly back on the cyclic
I recall the Gazxelle lurching up and to the right (retreating blade side???). Completely out of control for about 1 or 2 seconds as it then automatically pulled itself out of Jackstall. The pilot then regained control.
I went on to teach it hundreds of times as an Instructor and loved doing it by then!
The MoD stopped it shortly thereafter because it was damaging the control runs.
I often wondered if anyone in civvy street came across this phenomena and until this incident never heard of anyone experiencing it.
Looks like a very very lucky man surviving this incident, so, too the pax
