With the level of regression I get from 'security patches' :-) I won't blame the conservative mindset there.

The Air France Rio-Paris crash is a good example of sudden full mistrust of automation and sensors by the crew after a sensor failure appeared and then recovered. Very, very sad transcript and analysis... I'm arguing against myself here, singe it was also a huge case of crew management failure and it might not have gone to crash with only one person in the cockpit.