I’m going to throw a theory out there about Flight 370. And in my mind it makes the most sense considering all of the facts. I’m not a pilot, but know quite a bit about planes. Most of my family are pilots, including my grandmother.
Prior to this, the theory that I had read that I was agreement with was from a 777 pilot, who said there was likely a fire on board, they pulled the boards in an effort to put out the fire, which explains the loss of transponders, they turned the plane around to land at the closest airport. At some point the crew were overwhelmed and the plane flew itself for a while. With the speed and direction set the plane would climb and dive to control speed, which would explain it going to it’s operation ceiling of 40k feet, and then as far down as 12k. And then the plane just flew until it ran out of fuel.
What I don’t like about this is if there was a fire that was severe enough to kill the passengers it would likely have destroyed all the onboard systems necessary for it to fly an additional 6 hours. It doesn’t add up.
There was something on board that plane that someone wanted: a person, a thing, something. Gold or a biological weapon? And they had to get it off and make it look like an accident. And they had to put the plane in a place where it would likely not be found. It’s likely some member of the crew was involved that could have gained themselves, and likely others, access to the cockpit. After taking control of the plane they killed the transponders and set their plan in place. They climbed the plane to 40k feet and depressurized the cabin, killing everyone on board, except for them, in 30 seconds. They then descended the plane to 12k feet, skirting radar, until they were over a drop zone, either in the ocean or over northern Malaysia. They then set the plane on autopilot for a course setting and exited the plane with their cargo. And Flight 370 continued to fly into the South Indian Ocean where it still hasn’t been found.
Based on the current cat and mouse game with the black boxes, I don’t believe they have settled on the ocean floor and have been drifting with the current. If they don’t settle and they lose the signal for good, I don’t they will be found for a long time.