Originally Posted by
A33Zab
Remarkable, Engines have only 2 channels for control, 2 sensors for each parameter; B777 has only 2 AOA vanes fitted.
And usually two pilots.
What happened with redundancy here? even more 'ridiculous' design or clever engineering?
Clever engineering, risk assessment and mitigation.
Pitot tubes are here for the foreseeable future and the public demand for air travel requires flight into known icing conditions. The failure modes for pitot tubes are well understood but cannot with current technology be 100% engineered away.
Part of the risk mitigation is having two pilots (who have regular medicals etc etc), and a computer which recognises problems with the pitots and hands control over to these humans at an appropriate point. That recognition/handover appears to have been done properly.
Arguing about redundancy in pitots appears to be missing the point. The drama was turned into a crisis elsewhere.