What happened
The pilot departed from runway 33 at Aspen Airport, initiating a right crosswind turn toward the adjacent mountain pass. As the aircraft climbed above 11,000 feet mean sea level, the pilot reported that the airplane became "mushy," indicating a significant loss of aerodynamic performance or control authority.
Recognizing that the aircraft lacked the necessary climb performance to clear the pass, which has an elevation of 12,095 feet, the pilot elected to land straight ahead. The landing occurred on rising, mountainous terrain covered in brush. During this emergency landing, the right wing struck a signpost, causing the airplane to spin 180 degrees.
The investigation
The density altitude at the accident site was calculated to be 13,136 feet. This high density altitude significantly reduced engine power and aerodynamic efficiency, contributing to the aircraft's inability to maintain controlled flight or gain sufficient altitude to clear the terrain obstacle.