What happened
A pilot was conducting a personal cross-country flight under Title 14, CFR Part 91, navigating through an area characterized by steep mountainous terrain. The pilot's intended route involved flying over a mountain saddle located near the top of a glacier at 4,500 feet above sea level. While cruising at this altitude above the glacier, the aircraft encountered severe turbulence and downdrafts, which resulted in a collision with the glacier.
A U.S. Coast Guard C-130 aircraft operating in the vicinity detected a signal from the accident aircraft's emergency locator transmitter and subsequently located the wreckage on the glacier. The crew of the C-130 reported that while the area was initially covered in clouds, they found clear air to descend and return to the site beneath the overcast. During this approach, they observed approximately 200 feet of clearance between the cloud cover and the mountain saddle. They also noted a 40-knot headwind and observed that the surrounding mountain peaks were obscured by clouds. Due to deteriorating weather conditions, the C-130 crew was forced to depart the area.
An Air National Guard helicopter was dispatched to the site but was unable to reach the wreckage for approximately nine hours due to poor weather conditions. An Air National Guard para-rescue technician who established initial contact with the pilot reported that the pilot had attempted to turn down-slope to escape a downdraft, at which point the aircraft contacted the glacier.
Findings
At the time of the accident, the area weather forecast indicated marginal VFR conditions with rain and snow showers, though no significant turbulence was predicted. Automated weather observations near the site reported rapidly changing visibility, ranging from 10 miles to less than 1 mile, and ceilings fluctuating between 100 feet and 6,000 feet. The pilot reported that there were no mechanical anomalies with the aircraft prior to the impact. As of August 2006, the aircraft had not been recovered.