As the CAA said to us, LTE is hardly mentioned in UK training books - but if you get the US books there's plenty on it.
That is because of the relevent LTE experience which became a major safety discussion for OH-58 helicopter pilots particularly, and US military heli pilots in general back in the late 70's and early 80's. Fenestron Stall amounts to the same basic aerodynamic anti- torque profile.
Concerning this particular case, I doubt that an unresolved aerodynamic factor was the catalyst or main contributory cause to the destruction of the helicopter. What speaks volumes is the crash survivability design. Amazing that ther were no serious injuries or loss of life!
