What happened
The aircraft experienced an engine malfunction during the early phase of flight following departure. As the plane climbed away from the airport, the powerplant began to operate irregularly. The pilot assessed the situation and determined that returning to the takeoff runway was not feasible given the altitude and position. Consequently, the pilot executed a forced landing in a nearby wooded area.
The investigation
Following the accident, investigators conducted a thorough examination of the aircraft's engine. The inspection focused on identifying the mechanical failure responsible for the loss of power. Technicians discovered that the linkage connecting the mixture control had become disconnected. When the engine was restarted for testing purposes, it continued to run roughly until the mixture control lever on the carburetor was manually adjusted to the rich position.
Findings
The primary factor contributing to this incident was the mechanical failure of the engine's fuel system. Specifically, the disconnection of the mixture control linkage prevented proper fuel-air ratio management. This mechanical issue directly caused the rough engine operation that necessitated the off-airport landing.