With referenece to the Warsaw accident and Spoiler/Reverse. After this accident the air/ground logic was modified so that with one Main Landing Gear(MLG) compressed the spoilers would half deploy to assist in getting the other MLG down. Once this had occurred full spolier deployment would automatically happen. Additionally with one MLG compressed and REV selected, Spoilers will fully deploy. I think in the original Warsaw accident the aircraft travelled a considerable distance down the R/W with just one MLG compressed hence no spoiler.........
The fact this runway was ungrooved may have played a major part in this. If the crew realised the aircraft was aquaplaning (which would take some time for them to realise) and they then tried to go around it looks like they ran out of runway.
Bristol Airport in the UK had a lot of problems last winter due to a new surface waiting to "cure" before grooving. After a couple of incidents of aircraft sliding off the side (most) major operators refused to operate into the airport ...... it was grooved PDQ!
A4