Cessna U206G accident near Yuma, Arizona, May 6, 2010

The NTSB's narrative final · quoted from the NTSB record

The operator reported that the purpose of the flight was to release insects over selected agricultural fields, which the pilot would typically perform early in the morning, before the heat of the day. The operator provided flight track data for flights the pilot conducted on the three days prior to the accident. During all three flights, the airplane departed the airport, traveled to the west, circled two fields in the vicinity of the accident location, and then proceeded south. The recorded radar data of the accident flight depicted the airplane departing the airport and climbing to 500 feet above ground level (agl). The airplane proceeded west about 5 miles and then performed a left 270-degree turn. It then made a left-hand turn to the south-southwest and proceeded for 2 miles. About 8 minutes after departure, the airplane started a right-hand turn at 500 feet agl and after about 180 degrees through the turn, the radius of the turn started to decrease, and the altitude decreased to 100 feet agl. The final radar return was about 10 minutes after departure at 100 feet agl, in the vicinity of the accident site. A witness reported observing the airplane descend into the ground, which was followed by an explosion and fire. Sunrise on the day of the accident occurred about the time of the accident, and the radar data depicted the airplane descending out of 500 feet agl as it was turning into the azimuth of the rising sun. Sun glare likely momentarily impeded the pilot’s situational awareness enough to result in a rapid loss of altitude while in a turn. A postaccident examination of the engine and airframe did not reveal anything that would have precluded the normal operation of the engine or flight controls.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.