What happened
While performing a visual flight rules (VFR) approach to Kathmandu-Tribhuvan Airport, the crew encountered restricted visibility caused by a low cloud ceiling. During the final stage of the approach, at an altitude of approximately 6,000 feet, the aircraft struck a 100-foot radio antenna situated atop a hill. This antenna was property of the Nepalese National Broadcasting Company.
Following the impact with the structure, the aircraft lost control and descended, eventually crashing roughly seven kilometers before reaching runway 02. There were 15 fatalities among the occupants of the flight.
Findings
Investigation into the accident determined that the primary factor was the collision with an obstacle while operating under VFR conditions in an environment with limited visibility.