What happened
The Ercoupe Model 415 encountered an unexpected loss of engine power while airborne. Faced with the immediate need to land, the pilot executed a forced landing maneuver into an adjacent field. During the descent, the aircraft passed beneath overhead power lines without incident. However, the pilot was unable to avoid lower telephone lines that crossed the area. The aircraft collided with these wires, tearing through them as it touched down.
The investigation
Following the accident, investigators examined the engine to determine the root cause of the sudden power failure. Technical analysis revealed a critical mechanical failure within the internal components. Specifically, the No. 3 connecting rod was found to be broken, which directly resulted in the cessation of engine operation.
Findings
The sequence of events was driven by the mechanical failure of the engine component. The pilot's decision to land in the field was a necessary response to the loss of thrust. The collision with the telephone lines was a direct consequence of the aircraft's trajectory during the forced landing attempt. The serious injuries sustained by the pilot and the substantial damage to the airframe were consistent with the impact forces involved.
Safety message
This incident highlights the critical importance of regular engine maintenance and inspection to detect potential internal failures before they result in in-flight power loss.