Egypt Air loses another aircraft

[abaris]

With no distress call from the crew on a mechanical issue?  

In 1991 there was this Lauda air crash over Thailand. Plane seemingly fell from the sky for no reason. No communications, nothing. The found the cockpit voice recorder, the reassembled the wreckage - the real experts, I mean - and heard the copilot scream "It deployed", right before the recording broke off. Now they looked a bit deeper and what they found was the reverse thrust of one engine deploying in full flight. They tried to recreate the situation in simulators and noone was able to safe the day under these kinds of circumstances.

Only one of the seemingly unexplained rasons why planes do crash.