there might be a significant difference between three pilots in the cockpit and two pilots and a systems engineer. what air france and air aisia (and
Aeroperú Flight 603) hi-light is that computerisation did not do away with the need for an engineer just that that roll changed. If someone in either of those cockpits understood the systems and had a deep understanding of how various faults manifest those disasters arguably would have been averted. The problem was that the pilots could not figure out what information was valid and what to ignore. a dedicated systems engineer could have told them.