Hiya
I too have been experiencing a CTD when in the TFDi 717 (8 flights so far only 2 completed) with the last CTD being last night at 1900 (ish) UK time.
I felt it was when I moved from an internal view to an external view? Whilst frustrating as I love the aircraft and really want to complete a flight I understand new sim etc etc (I'm on V4) so I'll try another flight tonight and see if I get the same issue. Someone said to me that if they completed a flight with just an internal camera (chaseplane) it doesn't crash so they seem to back up my thinking just as an f.y.i.
Cheers
Paul