[MaggieL]

So far the "accident investigation" seem to amount to "the pilot was really not proficient because we can't afford to fly much and was doing maneuvers that hadn't been approved: pilot error".

The "engine failure" might well have been a compressor stall, not uncommon when doing radical maneuvers at an extreme angle of attack at low airspeed. And it wouldn't surprise me to learm that an aerodynamic stall and flat spin developed immediatiely thereafter, since the stalled engine would have caused asymmetric thrust that would have been very difficult to deal with.

A compressor stall occurs when the airflow to a turbojet engine is far enough outside the design envelope with respect to angle-of-attack, density and airspeed that a temporary reversal of airflow through the engine occurs. This can result in flameouts and other nasty occurances.

The differing appearance of the exhaust from the two engines in this image suggests to me that the portside engine isn't cooking anywhere near as hot as the starboard. Not exactly definitive proof and I'm not a turbine engine expert.

The missing and damaged airframe pieces have to do with the fact that the airplane is in the process of cartwheeling across the field. Look at the engine exhausts for a clue as to which way the aircraft is actually moving at this point.