Incident Overview
An aerial spraying operation was in progress from a private airstrip. The pilot had completed three loads earlier in the morning. After applying the fourth load, the pilot returned to the airstrip for another load. During the landing, the pilot applied both brakes but received no response from the right-side brake. The pilot reported pumping the brake several times with no result. Subsequently, the pilot applied full left brake, causing the airplane to spin 180 degrees. The right main landing gear collapsed, and the propeller struck the ground. The airplane then impacted a ditch and an electrical pole before coming to rest.
Investigation Findings
The investigation determined that the reason for the loss of brake pressure was not identified. No other causal factors were noted in the source material. The aircraft sustained damage to the landing gear and propeller, as well as from the impact with the ditch and pole.
Operational Context
The flight was part of an aerial spraying operation, with the pilot having completed multiple loads earlier. The landing was conducted on a private airstrip. The pilot attempted to address the brake issue by pumping the brakes, but the right brake remained unresponsive. The application of full left brake resulted in a sharp turn and subsequent ground contact.