Originally Posted by
Capn Bloggs
Wrong. They sum. Google Airbus Sidestick.
They sum *if used together*, this is true. But using the sidesticks together is not normal procedure and the systems will notify the crew with a "DUAL INPUT" annunciation.
Correct procedure dictates that upon passing of control from one seat to the other, immediately following or simultaneous with the "I Have Control/My Aircraft" callout, the stick selector button at the base of the stick is pushed. There is no reason to have two pilots on the sidesticks at the same time.
The evidence so far suggests that but for a second or so, this procedure was followed correctly.
@BOAC : I think the BEA "note" was released purely to alleviate the press "leaks" that were proliferating prior to release. Far better for us internet folks to be speculating with a limited amount of real data (which I suspect is all that they had confirmed at the time) rather than trying to sift through a mountain of press twaddle, don't you agree?