What happened
The pilot and two passengers were operating a visual flight rules (VFR) cross-country flight destined for Scottsbluff, Nebraska. While flying near Grand Junction, Colorado, the crew encountered instrument meteorological conditions (IMC). The pilot contacted air traffic control and successfully obtained an instrument flight rules clearance to divert to Cheyenne, Wyoming.
Upon arrival in the Cheyenne area, weather reports indicated 500-foot overcast ceilings with 1/4 mile visibility. Additional conditions included 1-mile tower visibility, light rain, light snow, and fog. During the descent toward the initial approach fix (IAF), the aircraft accumulated heavy ice. The pilot requested radar vectors to the final approach fix (FAF) from air traffic control; however, this request was denied because radar service was not available at Cheyenne.
With full power applied, the aircraft descended below the glideslope. The pilot reported that the aircraft suddenly began to climb, prompting an immediate missed approach execution. Following the initiation of the missed approach, the aircraft began to stall and lose altitude. Consequently, the pilot executed an emergency off-airport forced landing.