Incident Overview
A crew departed Bishkek on a special flight to Issyk Kul and Naryn for the calibration of ILS systems. Approximately 30 minutes into the flight from Issyk Kul to Naryn, the right engine began to vibrate while the left engine temperature increased.
Engine Issues
Following the onset of the right engine vibration and left engine temperature rise, the crew shut down the right engine. The captain then instructed the flight engineer to reduce power on the left engine by 80%.
Emergency Landing
While flying through the Karakuzhur Valley, the aircraft was unable to maintain a safe altitude. The pilot recalled an old dirt strip previously used for agricultural operations during flights with an Antonov AN-2. The crew attempted to land on this airstrip, which was located at an altitude of 2,700 metres.
Aftermath
Upon landing, the aircraft collided with rocks larger than 40 centimetres and drainage ditches. The aircraft came to rest and burst into flames. All 14 occupants escaped uninjured, but the aircraft was destroyed.