DIAMOND AIRCRAFT IND INC DA 40 — Cedar City, UT

What happened

Witnesses traveling near the accident site reported that they observed the accident airplane flying on an easterly heading about 200 to 300 ft above ground level. The airplane did not appear to be in distress. After the airplane passed over the witnesses’ positions, the airplane maneuvered as if the pilot were trying to turn it around. One witness stated that the airplane’s wings were almost completely vertical at that point. The airplane subsequently impacted mountainous terrain about 7 miles southeast of the departure airport. A postcrash fire ensued.

Postaccident examination of the airplane revealed no evidence of a pre-existing mechanical malfunction that would have precluded normal operation. A review of the airplane’s weight and balance information showed that, at the time of departure, the airplane was about 128 pounds over the airplane’s maximum gross weight of 2,646 pounds. The airplane was also outside the approved center-of-gravity envelope. The calculated density altitude at the time of departure was about 6,022 ft.

The calculated fuel use from the departure airport to the accident location was about 5 gallons. Thus, at the time of the accident, the airplane was likely about 98 pounds over the maximum gross weight. The calculated density altitude at the accident location and the time of the accident was about 7,203 ft. The calculated climb performance for the airplane, at its assumed altitude and air density conditions, would have about 300 ft per minute.

The excessive airplane weight likely limited the airplane’s ability to climb in mountainous terrain.

An editorial "what led to it / how to avoid it" analysis for this accident is generated separately and will appear here.