Yes, I've read quite a bit about AF 447. As someone who has taken some flying lessons, I know that in early aircraft, the controls were mechanically linked tog

Yes, I've read quite a bit about AF 447. As someone who has taken some flying lessons, I know that in early aircraft, the controls were mechanically linked together. There is no way one pilot could push the pitch control forward and the other could pull it back. But they could on the Airbus with a 'glass cockpit' being flown. The result: Software averaged the result, and the elevator stayed neutral, with no indication to either pilot that this was occurring. Tragic poor design.