Don't Sink.
Hmmm, now it's been awhile since I have had to play with the Auto-spoilers on a 737. But whenever we changed an speedbrake actuator, we could get it to 'fly-back' with either the switches on the antiskid box, or the air/ground switches in the fwd accessory compt. From what I remember (fuzzy brain time) if the wheelspeed wasn't detected (eg. aquaplaning) then once both the nose and right main gears sense ground, the actuator operates to extend the spoilers. After ground + 4 seconds, the signal was removed.
I may be wrong, I might have to hit the books again!
Cheers!
GTG!
