Specially treated runways
Can anyone point me to some good articles about performance on specially prepared winter runways? I had my first experience on a sanded runway in Sweden today and our only advice is to downgrade the braking action given by one category - so Medium/good is treated as medium.
There is no advice on what to do if you get other contaminants on top - if it is snowing on arrival for example can one accept any contaminant on top, and what braking action might one use? Or do you wait for the runway to be cleared or go elsewhere?
I was pleasantly surprised by how good the braking action was in general though - definitely better than some wet runways I've landed on.