Luis Schucani, Patricia Eggenberger, Eberhard Gich and Patrick Stafer.
"Africa is still the wild frontier" doesn't really apply here as far as the technical state of the aircraft goes. Judging by those names, all on board were Swiss. Ten to one they would've brought the plane with them from Switzerland. You see lots of little Swiss aircraft in and around the Med.
The weather could've played a big role. The Swiss met office is really good and these folks would've crossed the Alps to get to Africa. But I suppose the Moroccan met office pales in comparison.