What happened
The aircraft was engaged in an aerial application maneuver when it ultimately collided with the terrain. The impact occurred while the aircraft was rotating to the left and struck the ground in a steep nose-down attitude. At the time of the crash, the flaps were extended 25 degrees, and the airspeed indicator showed 55 knots. The throttle was found in the full forward position, indicating the engine was likely producing power prior to impact. Neither the pilot nor the aircraft owner held the necessary certificate to conduct aerial application operations. Furthermore, there was no record that the pilot had obtained the knowledge and skill test required by 14 CFR 137.
The investigation
An examination of the wreckage provided several key mechanical details. The fuel selector was positioned to the right fuel tank, and both tanks were found to have fuel remaining, ruling out total fuel exhaustion. Flight control continuity was established during the inspection, suggesting the controls functioned mechanically as intended. The T-handle for dumping the chemical load was found in the stowed position and had not been activated. Notably, the pilot held a second-class medical certificate issued on October 23, 1979, which included a limitation requiring the wear of corrective lenses. However, no glasses or contact lenses were found at the scene.
Findings
Several contributing factors were identified in this accident. The operational environment presented significant challenges, with a density altitude of approximately 7,200 feet and reported strong, gusty winds. These conditions require precise aircraft handling and adequate pilot proficiency. The absence of corrective lenses for the pilot, despite the medical limitation, likely impaired visual acuity during critical flight phases. Additionally, the lack of required certification and training for aerial application operations suggests a deficiency in the specific skills needed to manage the aircraft safely under these demanding environmental conditions.