A US Army helicopter pilot in the area at the time of the accident reported that he heard the pilot state on the Daggett-Barstow airport radio frequency that he had an engine problem and was 10 miles north of Barstow-Daggett airport. He then observed the airplane flying on a southwesterly course about 500 feet above ground level (agl) as it approached a series of power lines. The airplane then pitched up 15 degrees, yawed to the right, and made two 360-degree rotations while in a vertical descent before the airplane impacted terrain. There was no post impact fire.

Examination of the engine revealed a 2-inch hole in the top of the crank case between the number 3 and 4 cylinders. Metal flakes were identified in the folds of the oil filter, and metal flakes were observed distributed on the interior surface of the oil sump. The number 1 piston connecting rod was not attached to the crankshaft and the end cap was bent flat. The connecting rod and end cap were not discolored. The number 4 and 6 connecting rods had separated from the crank shaft and exhibited black discoloration consistent with extreme thermal stress. The number 5 connecting rod was attached to the crankshaft with its end cap attach bolts in place, however, it was discolored brownish-black. The bearing had extruded and deformed between the crankshaft and connecting rod yoke. The number 2 connecting rod was attached to the crankshaft and had dark discolorations. Mechanical damage to the interior of the engine case was evident with the most damage observed by the numbers 1, 2, and 4 cylinders

He then observed the airplane flying on a southwesterly course about 500 feet above ground level (agl) as it approached a series of power lines.

WWhunter wrote:Condolenses to your friends L-19.