Introduction
On the day of the accident, weather conditions in the area were extremely variable. The pilot obtained a weather briefing, during which VFR flight was not recommended. However, after the weather improved, the pilot decided to proceed with the flight.
Sequence of Events
While en route, the pilot encountered snow showers and descended to 500 feet above ground level (AGL) to maintain the best visibility. Without warning, the aircraft flew into a snow squall and whiteout conditions while passing over a ridge immediately west of the Kustatan River. The pilot attempted a 180-degree turn, but the aircraft struck snow-covered terrain and crashed.
Aftermath
One occupant, an infant, sustained fatal impact injuries. The survivors were located approximately 21 hours after the accident. The emergency locator transmitter (ELT) switch was found in the 'off' position, and no ELT signal was heard by other pilots in the area. Another pilot who encountered similar weather conditions at the same time and location diverted to an alternate airport.
Investigation Findings
The official investigation identified that the aircraft was in cruise flight when it encountered snow and whiteout conditions over snow-covered terrain. The probable cause was determined to be the pilot's continued VFR flight into instrument meteorological conditions (IMC).