[ajlburke]

My local airport (Halifax YHZ) has notoriously bad landing conditions, and around a year ago I was in a 767 that aborted its landing and went back around. Turns out (at least as far as I've been able to tell from Wikipedia etc.) that the entire aborted landing sequence is activated in one step by the pilot and the plane does all the multiple complicated things it needs to do (change thrust, trim, flaps, etc.) mostly by itself. How that would work with bad sensors is a separate question - although presumably by this point in a flight you'd know what's up with your sensors one way or another.