Kaptin M
speedbrake deployment is dependant upon main wheel spin up
Can’t see that that is one of the requirements for Ground Spoiler extension. Boeing might be different but the A330 FCOM 1 section 27 states that full extension of the Ground Spoilers will occur at landing if both main landing gear have touched down and:
· They are armed, and
· All thrust levers are at idle, or
· Reverse is selected on at least one engine (other engine at idle).
I have always been told that “greasing” it on is to be avoided, not because it increases the risk of aquaplaning but because it increases the risk of touching down outside the “zone”. If you know the runway is going to be slippery, it is best to get it on the ground, allow the spoilers to auto deploy and use full reverse thrust as these devises are most effective at higher speeds. Once the aircraft has slowed enough, the auto brakes with anti skid working should start to become effective. Obviously allowing the aircraft to float down the runway because you were after a “greaser” is a bad move in this situation and should be frowned upon.