Incident Overview
During cruise flight at an altitude of 12,500 feet above sea level over mountainous terrain, the pilot of a single-engine aircraft encountered engine roughness. The engine subsequently lost power, prompting the pilot to select an emergency landing area on a sand bar. Upon touchdown, the aircraft encountered soft terrain, resulting in damage to the nose wheel, right main landing gear, and the right wing.
Postaccident Examination
A detailed examination of the engine was conducted following the incident. Investigators discovered a hole in the engine case at the location of the number 2 cylinder. The number 2 connecting rod was found to be bent, and the rod bolts were broken. Additionally, the connecting rod bearing exhibited discoloration consistent with exposure to high temperature.
Aircraft Damage
The aircraft sustained structural damage to the landing gear and wing components. Specific damage included the nose wheel, right main landing gear, and the right wing. The extent of the damage required further evaluation for repair.