Originally Posted by Dave Gittins
It appears to have suffered an inflight break up or at least a partial break up which made it uncontrollable.
Potential reasons are overspeed or stall due to issues with speed sensing or violent turbulence in CBs. The aeroplane's composite structure may have some or no bearing.
- in answer to your request, DG, I would say the jury are still undecided on this. It is even possible (as far as I can ascertain) that it might even have attempted to ditch.