Reversers are not calculated into the FAR
landing requirement figures...
You can get away with no reversers even on large gets, however, you definitely need a working lift-dumper/spoilers/speedbrakes... Otherwise your wheel brakes won't do their jobs properly!
Big crosswind on a narrow runway, forget the reversers, just touchdown firm, check speedbrakes deployed, and brake (auto, or manual)... Better than getting distracted with the fiddling of the reversers coz the wind is slewing you places!
But a friend of mine aquaplaned his F28 on a tailwind and a very slippery runway (WAAA 13/31, which we affectionately call the "Skating Rink") and used about 2200m to stop! Would having reversers help? Think yourself
Back to the picture... So, is the plane not using reversers or not having reversers? I wonder...T/R INOP is not a crisis, not using it is not a big deal, but having it not fitted? This is new for the 320 for me
Correct me if I'm wrong but that white part of the nacelle is the reverser doors right?