ICould be a failed window from blast pressure. Could be a bogus reading if a wire bundle was on fire or shorted.

Could be someone's hoverboard (I think only US carriers ban them), that caught on fire in the forward cargo area, that eventually caused a wire failure, giving a false reading.

Or, they hit something. I passed within an estimated 3-400 feet of a weather balloon at FL390. If the transmitter hit a window, who knows what might happen?

Or none of these.

I lean towards Baseball's analysis..

They wouldn't just flap their jaws about terrorism if they didn't have some insight into the issue...

Well, since its a fixed window it sounds symptomatic of a cascading electrical failure.

most of the electrical emergencies I have had I also had time to let ATC know. The buses that power the radios are on opposite sides. At least one radio should work.

Cascading indicates complexity and that indicates a higher degree of time.

Yes it's all just hypothesis, but until the black boxes are discovered that's really all we can do. It doesn't hurt anything in a sterile environment really. It's the internet equivalent of kicking tin.

Although that same site is now suggesting UFO's may have been involved: EgyptAir 804: Pilots 'saw UFO with green flashing lights' an HOUR before mystery jet crash - Mirror Online :rolleyes:

Over the ocean at night and a massive electrical failure rendering the flight instruments inop. No attitude info, no airspeed/AOA, no thrust info and maybe even no thrust control. It wouldn't take long to lose control of the airplane in that situation and once control was lost (stall/spiral dive) a back ocean and no flight information makes recovery questionable. A break up is likely.

Just more speculation though.

Just shine that flashlight on the 'peanut gyro' and steer the plane towards the nearest glow of a city. With no flight instruments +/- 50 kts is close enough.

Just offering up a procedure for loss of all electrics in the above post.

Hopefully the data recorder with be retrieved before long.

The Med bottom in that area is mountainous and volcanic (who knew) with depths in the 10,000' range.
It's not going to be easy retrieving that box.