Accident
While descending to Phônsavan Airport, the flight crew encountered foggy weather conditions that fell below the required minimums for approach. As the aircraft neared the airport, the pilot did not recognize that the altitude had become too low. The aircraft subsequently struck trees and crashed in a hilly, wooded area located 28 kilometers from the airport. The impact caused the aircraft to burst into flames. All 18 occupants aboard the flight were killed.
Probable Cause
According to the official investigation, the probable cause of the accident was controlled flight into terrain (CFIT). This occurred after the crew decided to continue the approach below the minimum safe altitude while operating in weather conditions that were below the designated minima.