[dingaling]

> That suggest there was only ever one pilot flying

"Pilot flying" is a human-factors title, not a software function-lock. It just indicates who has control responsibility at that moment but it is not enforced by technical means.

It is intended to eliminate ambiguity in crew functions; the PF can be a newbie copilot even if the commander of the aircraft is a 30-year-service Captain who would become the PNF at that point. Its all part of Crew Resource Management theory.

There should only be one PF in a cockpit at any one time, precisely to avoid the situation that arose with the Air France flight where the computer was receiving inputs from two pilots.

[jussij]

I was responding to the claim the flight control was averaging the two pilot inputs, because if that was the case then two pilots would have been flying the plane.

Might point was I doubt that this was in fact happening and there was only ever one pilot in charge.

> the Air France flight where the computer was receiving inputs from two pilots.

The link and quotes I posted suggest that was not happening.

The system was just ignoring the other pilot (and that was the designed fault) because it also failed to tell that other pilot he was being ignored.

[foldr]

>because it also failed to tell that other pilot he was being ignored.

It didn't fail to tell him. That's what the dual input alarm is for.

[jussij]

I will have to take your word on this dual input alarm as I have not read or seen any details on this alarm.

Now if that alarm was raised then that suggests both pilots were in error as they both seemed to have ignore that alarm.

However that was never the reason for my original reply.

All I was replying to was idea that the flight control was doing some sort of averaging of the two pilot inputs.

That to me just seems illogical as it would asume two pilots trying to fly the same plane and that scenario will never end well.

[foldr]

>Now if that alarm

The sounding of the alarm is in the transcripts in the accident report.

The Airbus does average the inputs if both pilots are making inputs at the same time.

[jussij]

> The Airbus does average the inputs if both pilots are making inputs at the same time.

Do you have a url/link/pdf that describes this behaviour?

[foldr]

https://safetyfirst.airbus.com/app/themes/mh_newsdesk/docume...

"When both sticks are moved simultaneously, the system adds the signals of both pilots algebraically."