Many years ago I remember being told on my DC9 course that you should always lower the gear before arming the speedbrake for landing, the reason given was that in case of a problem with Air/Ground logic you would receive full ground spoiler on selecting gear down.
I was led to believe that someone had learned this the hard way, and continued to respect this sequence of selection in 20 yrs of 737 flying.
Can someone tell us if this failure mode is feasible with A320 Air/Ground logic failure.