"I was there when, still sitting in the flight deck at Muharraq , the Captain of a B707-338C, operating as QF739 on February 21, 1969 explained how he regained control after the aircraft went out of control over the Arabian Gulf on route to Bahrain at FL350 and M 0.81, dived inverted, rolled, probably went supersonic momentarily (not recorded accurately due to compressibility issues at the pitots) ) recorded +4.57G and - 0.63 G, and lost 19,000 ft.
"I realised that we had finally entered a spin", he said, "so I recovered it like I would a Tiger Moth. No big deal." And off he went with the crew for a stiff drink in the Gulf Hotel. We found soap stuck to the ceilings in the toilets."
No spin. Apparently pilot induced high altitude upset.
The Bahrain Bomber Incident