DB Cooper bailed out of an aft stairway on a 727. He also demanded that the cabin remain unpressurized and he bailed out at a relatively low 10,000 feet, with the airplane travelling at a very slow 120 mph.
After DB Cooper used an airstair to escape from an aircraft in mid-air, Cooper vanes were installed to prevent an aft stair from being deployed in flight.
Thanks for the info — shows what I know. I remember he bailed out at relatively low altitude. I love the term “Cooper vanes.”