What happened
The pilot reported obtaining a complete weather briefing and an instrument flight rules clearance for a trip from Grand Marais, Minnesota, to Des Moines, Iowa. Departure proceeded without incident, although winds aloft were stronger than initially forecasted. During the en route phase, the pilot received two in-flight weather advisories but elected to continue toward the destination airport.
National Weather Service data confirmed that icing conditions existed along the entire route of flight. Multiple Federal Aviation Administration personnel indicated that the pilot was explicitly warned about these hazards during all communications with Flight Service Stations. The situation changed only when the aircraft began accumulating rime ice, at which point the pilot requested vectors to a nearby airport for a precautionary landing.
The aircraft touched down nose-first after the pilot reduced power over the runway threshold. The impact caused the nose gear to collapse, resulting in damage to the propeller and engine mounts. A post-accident inspection confirmed the presence of ice along the leading edges of the wings.
The investigation
Post-accident examination of the airframe revealed significant ice accumulation along the leading edge of the wings. This physical evidence corroborated the pilot's statement regarding the onset of rime ice prior to the emergency landing attempt.
Findings
The primary factors contributing to this accident were the pilot's decision to continue flight into known icing conditions despite multiple warnings, and the subsequent loss of aircraft control due to ice accumulation. The structural failure of the nose gear was a direct result of the high sink rate associated with the nose-first impact.
Safety message
Pilots must strictly adhere to weather briefings and in-flight advisories regarding icing. Continuing flight into known icing conditions without appropriate equipment or clearance poses severe risks to aircraft control and structural integrity.