the same cable or the same type of cable?
if it is the same cable and the data for passengers usage is the same data cables as that used to fly the plane it does seem a little strange as you would think when planes now days have so many redundancy systems so that if something fails that their is a back up system to cover it that the idea of access to the computer systems controlling the flight would be so exposed. I would have thought that with the new caution in the air (no pun meant) that if they design along those lines it would not FCC would not approve it this would mean the plane would not be allowed to enter the USA.
Considering the size of the new plane if you take USA out of approved flight paths the cost of the project would prob not cover itself. With the US government being that paranoid and the ideas of Hijacking being in the forefront of their minds they would have to be very very inept to miss this.