O great....
In my airline it is good practice to leave the flaps/slats extended after landing in snow or on a contaminated runway. Just in case ice has accumulated on and between the flap sections, which can cause damage when the flaps are retracted.
So next time whem we land in JFK and it is a winter wonderland, We have to make a choice:
1. possibly cause damage to the flaps by retracting them in snow
2. expect a welcome-party at the gate.
