A valid line of investigation, Turin, but although non-FBW 'pilotless aircraft' have successfully flown for many years it is unlikely that they will in the future, so I believe the focus should be on FBW. You also open the catchment area significantly - take the AMS THY 737 - non-FBW, but the accident significantly aggravated by 'failure' of the 'operating and protection systems' ie A/T-RadAlt and Auto-trim, and you add another large dimension to the data sweep. I think we should seek to avoid too many sub-branches.