The airplane was under stable control as it flew into terrain. CFIT, as it's called, is a significant source of crashes, often occurring during improperly executed non-precision approaches or in "black hole" visual approaches. CFIT led to the development of better cockpit procedures, including altitude call-outs, and the development of the Ground Proximity Warning System.
We put windshear crashes in this category since the airplane usually collides with the ground in control; the windshear leads to a changing inertial system which puts it at a disadvantage.