Accident Details
A LI-2 aircraft was cruising over a mountainous area when it passed over a pass and encountered severe turbulence and downdrafts. These aerodynamic forces exceeded the structural limits of the wing and tail, causing the left wing tip and tail section to shear off. The aircraft became uncontrollable, plunged into the earth, and crashed in a wooded area on a mountain slope at an altitude of 1,760 meters.
Wreckage and Casualties
The wreckage was located a few hours later, approximately 80 meters below the summit. All 31 occupants on board were killed in the crash. This accident remains the deadliest involving the LI-2 type.
Investigation Findings
The official investigation determined that the airplane encountered severe downdrafts and turbulence that exceeded the certification limits of the wing and tail structure, leading to structural failure and loss of control.