Incident
The accident sequence began when the aircraft touched down on the frozen surface of a lake in the vicinity of Nondalton. Almost immediately, the ice gave way, leading to the aircraft breaking through and partially sinking. The pilots, both of whom were aboard, received injuries. The aircraft itself was declared damaged beyond repair.
Official Findings
The official investigation determined the probable cause to be improper in-flight decisions or planning by the flying crew. Specifically, the aircraft broke through the ice on the lake. The Flight Service Station (FSS) had a message available for the pilot regarding the ice conditions on the lake. However, the crew did not contact the FSS before landing to receive this advisory.