Thanks for the update as to what the FAA directive ..
and this bit " 220mph - the Special Condition is issued as a pre-requisite to certifying a new system (generally Special Conditions are issued when the FAA believes that the existing FARs are not adequate for certification of new or novel technologies - the 787 had a boatload). The 777 system that the FAA issued SC against is still in development and won't enter service for some time."
My point in raising or trying to get facts on the issue was to hopefully tamp down the news reports much like the ridiculous press efforts re the AD and corrosion issues.
Even so - IMHO- the concept of NOT using a completely isolated public system from FBW systems ( and certain comm systems ) is stupidity squared or cubed. IF and when such a system is merged/implemented/ installed, and x years later a 737 or 777 has an upset or accident, there will be more time $$ and effort proving that that tie in was NOT involved than to simply pay for an extra server and cabling, etc.
IMO a 99.9999 probability that such can not happen is not sufficient.
Many years ago, Boeing was responsible for sneak circuit analysis on apollo. Did an excellent job of finding such.
Yet the 787 battery issue and a fire on board in electrical panel during flight test sort of showed that capability was ignored, lost, or not followed up due to cost and schedule. IMO this proposed system will eventually bite them in the **** simply from
PR...
