Well, might as well give my guess. I’m guessing that this plane is sitting intact and hidden on some remote airstrip. There were lots of military strips laid down during WWII in this part of the world. Why would terrors do this? Well, perhaps they have a grand plan for this plane. Who knows, fly it into some tall skyscraper, a sporting event, maybe deliver a bomb or chemicals. Anyway, I think those two Iranians along with the manifest list should be checked out for previous pilot or technical aircraft training. Somebody, either a passenger or one of the pilots shut off the transponders and other electrical signal emitting systems on that plane so that it became invisible. In my humble opinion there were no technical or mechanical malfunctions on that plane.....
My theory is . . . The navigational box (FMC) was inputted wrong. Wrong waypoint. No one double checked as per procedure and they went there merry way. Got to top of climb, asked for dinner, bullshitting with flight attendants. Not paying attention. Captain closes his eyes to rest. Plane turn to wrong inputted waypoint. At night, no one really feels it or checks it. After period of time they realise they are not where they are suppose to be.
Pilots turn OFF transponder in a effort to cover up their mistake. Yeah, I know its stupid on their part, but actually its more common practice than anyone here realises
Culturally, they will not ask for help, nor admit they made a mistake to anyone outside the cockpit. They now are in a panic for many reasons. Mostly their job and career. Fully desperate, they may even go low below the radar so to speak, so as not be seen until they figure things out
After that anyones guess. Do they panic more? The autopilot has become disengaged without anyone realising it? That could occur if pilots are frantically inputting and pressing engage, or moving the control in a upset/panic mode to get plane turn in the right direction. Happens many times. Yes their is a warning horn for when it becomes disengaged, but in this scenario both heads are down "in the box" as we call it or mostly focused on other tasks at hand. No one is paying attention nor flying the plane. No delegation of duties. They desperately trying to figure where they are at and how to get back to where they are suppose to be.
In a slow descent, no one paying attention, or plane rolls inverted and now they are completely and hopelessly situationally lost.
For you non believers and conspiracy buffs, I just described numerous crashes that have taken place before. However, most are found on land.
Fire away flamers
None of which could take a plane that weighs as much as a 777.