THE AIRPLANE CRASHED AT THE 3300 FOOT LEVEL ON A MOUNTAINSIDE WITH AN APPROXIMATE 30 DEGREE GRADIENT. THE PILOT SAID HE WAS ON APPROACH TO LAND ON THE MOUNTAINSIDE, AND THE AIRPLANE ' TOUCHED DOWN EARLY'. THE PASSENGER SAID THEY WERE PLANNING TO FLY THROUGH A PASS TO THEIR FRONT, AND THE AIRPLANE GOT 'TOO LOW AND TOO SLOW', THEN COULD NOT OUT CLIMB THE RISING TERRAIN. THE HELICOPTER PILOT WHO RECOVERED THE WRECKAGE SAID THERE WERE NO SUITABLE LANDING AREAS NEARBY.