if its a bird strike than
plan did not went down in a second . . . .
there should have to be some kind of communication between controller and the pilot
and there should not be any kind of ambiguity to that . . .
i suspect its some thing else . . .
At low alt, which is what is being suspected. a bird getting sucked into the engine can be lethal.
The pilot was flying over a civilian area, so he gains a little altitude and gets the best range out of that situation to get the stricken aircraft out of potential collateral damage. He is communicating.. so the ATC's log would be handy in the investigation.
A few seconds after the mishap.. the aircraft has become uncontrollable and is about to hit the ground, the pilot ejects at what is fairly low alt.. but the seat get him out of the situation. However his chute does not deploy and he does not survive.
The jet goes on at its speed for a mile or two and crashes inverted.
The only possible explanation for this is a catastrophic engine failure that made the aircraft unflyable.
Or the computer systems on board suffered massive failure and then the hydraulics too failed
This is VERY VERY unlikely.
The only thing that makes sense is an outside variable caused the failure.
Anyway, the investigation is probably ongoing and the results will come in. They'll probably be released to AFM.. so you'll find out then.
Until that report comes in, to all and sundry.. the JF is still an extremely reliable piece of equipment that has not suffered a single failure(even a minor one) until this incident.
That speaks volumes.