There is always a NAV chart available, that doesn't mean they ever looked at it, or if they had ever flown out of there before. My guess is that they were late, rushed, and got bit. That was a VFR runway. 3500 feet is barely if at all enough room to get that thing airborne. Fox should shut up about flaps, because without them, that thing would have never left the ground at that distance.
As in 99% of all accidents like this, the pilots simply blew it. It will happen again, and again and again.
So now, as well as watching out for bad men in the cabin, we gotta take a look out the window to make sure the pilot is on his mark?