On December 30, 2003, a Piper PA-12 (registration N3624M) was involved in an aviation accident near Togiak, AK. Investigators recorded the probable cause as: A loss of engine power due to an undetermined reason that resulted in a forced landing, a collapse of the main landing gear, and a collision with trees. A factor associated with the accident was the lack of suitable terrain for a forced landing. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A commercial pilot reported engine roughness and power loss during cruise, leading to a forced landing on snow-covered terrain. The right main landing gear collapsed and the left wing struck trees, causing structural damage. Postaccident inspection did not reveal a reason for the power loss.
Incident Description
A certificated commercial pilot was conducting a cruise flight over tree-covered terrain when he noted a rough running engine and a slight reduction in engine rpm. Emergency procedures for engine roughness were attempted but did not remedy the condition. The engine subsequently experienced a rapid loss of power, resulting in a loss of altitude.
Forced Landing
Faced with the loss of engine power, the pilot selected a forced landing site in an area covered with snow and trees. During touchdown on the soft, snow-covered terrain, the right main landing gear collapsed. The airplane then pivoted to the left, and the left wing struck a stand of trees. The airplane sustained structural damage to the left wing and fuselage.
Postaccident Inspection
A postaccident inspection of the airplane was conducted but did not reveal a reason for the loss of engine power.