Notso - me too, but that's what our aerodynamics instructor (a DC-9 skipper with SAS) told us bright faces. His story was that ATR was an option which SAS didn't take, but McD still installed as it was cheaper, production wise, than not to. Therefore crews were never briefed on the operation of the system. The story may be flawed, and I'm more than happy to be reliably informed otherwise.
By the way, the terrain around Stockholm may seem flat and unbuilt from an altitude, but down on the ground it's rather undulating with quite sizable chunks of cumulu granite sticking up. That is, if you don't end up in the archipelago which has a charming combination of wet patches surrounded by CG. I personally wouldn't want to be paxing in an off-site landing there. Netherlands, on the other hand
