Accident Description
The pilot reported that while maneuvering for an aerial application run at approximately 100 feet above ground level, the airplane began to sink. When he added power, the engine did not respond. The pilot attempted to avoid obstructions, but the airplane subsequently struck a fence and crashed into a cultivated area.
Witness Observations
Witnesses reported hearing "sputter," "back fire," and "cutting in and out" noises emanating from the engine.
Postaccident Findings
Postaccident examination revealed little to no damage to the three propeller blades. The pilot reported that he had taken off with full fuel and that the accident occurred 10 minutes after takeoff. At the crash scene, fuel was found in one of the two interconnected main tanks; the other main tank was empty, but the wing containing that tank was substantially damaged.
Engine Test
In a postaccident test run, the engine operated successfully with normal fuel pressure and turbocharger operation after the electric boost pump was primed. After the boost pump was subsequently turned off, the engine continued to run normally using the engine-driven fuel pump.