[6SJ7]

Evidence seems to point to sudden, catastrophic failure. I suspect terrorism or some other explosion. If there were no pilot communications, something went awry really quickly.

I think you're correct. I've heard no report on the altitude of the aircraft. That far out from its departure, it should have reached a cruising altitude. What was the plane's descent rate?

[ASOC]

The aircraft (or pieces thereof) likely hit at

terminal velocity.