I assume your asking me.To this I ask:
If you believe there was no failure - especially electrical, please explain why the transponder was turned off,
and no contact to ATC was made prior to the change of course.
Also , if the engine ran out of fuel why would the STBY battery, and/or RAT not be able to supply enough
reserve to issue a MAYDAY to ATC?
Perhaps I've missed your stance because I have not read back far enough, so please link me to a post
that explains your position. Thanks.
At this point, after reviewing the facts to date, along with some logic, and basic physics - I personally believe (at this point) it was a situation similar to Ethiopian Airways, only the highjackers weren't dumb kids - they had some knowledge of aircraft systems.
But - there are still problems with all possibilities at this point, so I remain open to most of them. It's just that some - such as a fire or ghost planes - are so remote or have so many issues that they get placed in the relm of near impossibility.
The RAT does not provide electrical power, only hyd pressure. The APU will automaticlly start if both engines flame out - which is probably what accounted for the last half handshake. The lack of mayday is one of the puzzles here. I had concidered the murder/suicide earlier, however only on the basis that someone had a big insurance policy and had fallen on hard times, but if that was the case I would think investigators and the media would have been all over that by now.