At this point, there are no FAA regulatory requirements for the contaminated runway case. For the wet case, both FAA and JAA (and EASA) allow credit for the use of reverse thrust. The JAA (EASA) also allow credit for the use of reverse thrust in determining contaminated runway accelerate-stop distances.
Just a quick question if I may, can you please confirm that in the wet/contaminated accelerate-stop case, the FAA figures are predicated on the use of reverse thrust, whilst in the JAA rules use of reverse thrust is not taken into consideration???