significantly more information, but will it be enough? >> if there is something conclusive on the 82 parameters, it will narrow the accident down to where they may not have to reconstruct the entire aircraft. >> reporter: they could choose to recover a few pieces and reveal the rest of the puzzle. alexandra field, cnn. >> cnn has learned boeing has a system to fly a plane by remote control from the ground in an emergency. as brian todd reports, the incident might have turned out differently. >> reporter: a lost signal. a vanished plane. on the ground, a feeling of helplehelp lessne lessness. an idea has circulated on remote control in stressful situations. in 2004, boeing applied for a patent for uninterrupt able auto