Diversification:
To use the BUSS, the crew must first disconnect the three ADRs ...... With the BUSS system, speed is no longer calculated by the Pitot probes, but by the aircraft's incidence probes.
This sounds contradictory to the description given by takata
here. The manual says that if the ADR is disconnected, it turns off both the pitot probes and the AoA probes ("incidence probes"). So something is inaccurate here?
GolfSierra:
Potentially, one solution to an air-data-independent flight control system might be based on the inertial and acceleration sensors, see my suggestion
here.
The big challenge, however, is that an airplane flies in the local air which is moving around affected by local wind and turbulence, and must remain within its flight envelope in relation to that local airmass. Some sort of airspeed sensor (as opposed to groundspeed, as provided by GPS and inertial) therefore seems fairly indispensable, at least for critical flight regimes at high altitudes and approach/landing phases where the local wind needs to be considered.