investigators to believe those options are not viable. the plane landed somewheres as the the months ticked by and no pieces of the plane were discovered. some speculated it was possible the plane had landed. but no communications from the people on board or hijacked demands made that seem less pos but. mechanical failure, a theory that a catastrophic mechanical failure brought the air craft down is still being kidded.considered. rapid decompression. the cabin loses pressure and passengers and crew become unconscious. plane on autopilot flies until it runs out of fuel and crashes. without evidence, they are all just theories leaving grieving families in limbo wondering what happened to those they lost. now in addition to those developments about plane debris in the western indian ocean, we