Once again folks - this appears to have NOTHING to do with visual or non-precision approaches. Look at the map?
If you extend the downwind leg and slowly lose altitude from the what the visual pattern altitude should be, you end up at the crash site.
As this is a straight course and less likely associated to a turn some other distraction may have happened. Remember the otherwise intact 1011 ending in the Everglades when the 3 man crew was dedicated to get the landing gear ind9cator working.