Why even bother with a crash investigation. It seems Heli-jet has got all the answers. Heli-Jet, were you there? Were you in the cockpit when things started to go South? Obviously not, so I would appreciate it if you don't jump to conclusions so quickly. Obviously what you are explaining is a possibility, but it is only that, A POSSIBILITY. In that part of the world there are a number of other things that could cause this.