Flight Conditions
The private pilot, who held a non-instrument-rated certificate, operated a recently certificated aircraft into an area characterized by low ceilings, low visibility, rain, and snow. No flight plan was filed, and no record of a weather briefing was found.
In-Flight Events
A surviving passenger reported that during the flight, the pilot flew into clouds that were initially scattered but became thicker and darker as the flight continued. The passenger stated they flew into "ice clouds." Ice accumulated on the aircraft, and the engine began to falter. Carburetor heat was reportedly applied too late to prevent engine stoppage.
Distress Call and Crash
At 1501 Pacific Standard Time, a distress call was made. Shortly thereafter, the pilot transmitted that they were "going down," after which radar and radio contact were lost. The aircraft collided with trees on mountainous terrain and crashed.
Search and Wreckage Examination
The emergency locator beacon (ELT) did not operate. The aircraft was not found until 1012 PST the following day, approximately one mile from where radar contact was lost. Examination of the wreckage revealed evidence that snow and ice had accumulated in the engine air filter. Ice was found in the wire screen and the plenum behind the filter. The carburetor heat was in the on position.
Environmental Conditions
Residents approximately five miles away reported that heavy snow was falling at the time of the accident.
ELT Malfunction
Two defective transistors were found in the ELT, which would have prevented its operation.