[gordner]

I know more than a few pilots that would be hard pressed to fly without their FMS and autopilots...
Scale really is the key as motion points out, this is a very rare occurence and not easily preventable. How far do you revamp the system to prevent an occurence with such a low probability? Psych testing is a great idea for sure, but certainly presents its own host of issues. No easy answers here I don't think.