Thanks for your kind reply, henra. I have revisited the Preliminary, and take note of pp51 forward to 02:13. Initially the PFD's (display) are denied FD (director), it was selected but unavailable. Next comes the failure of the FPV (bird), and all orientation by PFD is eliminated. This implies to me that all attitude (and airspeed) values are not transmitted to the screen; the discrepant pitots are minimally reacting to a decrease in a/s of thirty knots from the medianed number, so none can be seen. BUSS (back up speed system) is an expensive option, and was not chosen for this aircraft. I am lacking the perception of an available value for attitude, of any kind, airspeed likewise. Add to this the need to know power, either by throttle lever position, or a displayed value by N1 (or epr). What am I missing? Lay it on, I have thick skin.
thanks again
bear