Accident Sequence
The aircraft was observed with its wing dipping as it flew low over a valley. The aircraft then touched down in a field, where it collided with a boulder and a tractor trailer.
Aircraft Examination
Examination of the aircraft disclosed no evidence of a malfunction.
Environmental Conditions
The accident site is located six miles east of the departure airport. The terrain between the airport and the accident site slopes up at six degrees. The airport elevation is 1,572 feet, with a density altitude of 4,000 feet. The accident site elevation is 2,650 feet, with a density altitude of 5,100 feet. The outside air temperature was 90 degrees Fahrenheit. The flaps were extended down 10 degrees.