Originally Posted by exeng
Nobody was aware that the angle of attack sensors were inoperative so how could the Pilots be informed of this?
- the answer to that is, as SPA83 posts,
'
CS 25.1309
(c) Information concerning unsafe system operating conditions must be provided to the crew to enable them to take appropriate corrective action. A warning indication must be provided if immediate corrective action is required. Systems and controls, including indications and annunciations must be designed to minimise crew errors, which could create additional hazards'
I would have expected an aircraft, which is supposed to be all things to all pilots, to know when 2 of its 3 PRIMARY sensors have 'failed' and therefore disagreed with the third. It is not even as if all 3 had failed at the same alpha when the warning system would need to be extra-clever.