Accident Overview
An aircraft operating an uneventful flight from Tehran began its descent to Khorramabad Airport's runway 11 in bad weather conditions. During the approach, the crew lost situational awareness due to poor visibility and failed to recognize that the aircraft had deviated from the intended course. The aircraft subsequently struck the slope of a mountain located a few kilometers northeast of the city of Sarab-e Dowreh, approximately 25 kilometers northwest of the runway 11 threshold.
Wreckage and Impact
The wreckage was discovered several hours later on a snow-covered rock wall. The aircraft disintegrated upon impact, and all 119 occupants, including four Spanish citizens, were killed.
Probable Cause
The official investigation determined the probable cause to be controlled flight into terrain (CFIT) after the crew failed to follow the approach procedures and the company's standard operating procedures (SOPs). This failure caused the aircraft to deviate from the approach path by 3 nautical miles to the north when it struck the mountain, which was shrouded in clouds. The lack of visibility due to poor weather conditions was identified as a contributing factor.