Instead of this "slam-dunk" approach, the airplane gradually descended until it reached 2,600 feet as it approached the MAP. At that point, instead of executing the missed approach, the airplane continued to descend to 1,400 feet, which was just slightly higher than the minimums specified for a straight-in approach using DME. The NTSB report says they continued about eight miles past the airport and then initiated a climb straight ahead. They had climbed about 700 feet over the next two miles when they declared a missed approach on the approach control frequency. Shortly after the controller acknowledged the call, the airplane struck mountainous terrain at an elevation of about 2,400 feet.