Accident Overview
While cruising in marginal weather conditions, a four-engine airplane en route to Juanjuí deviated from its intended course and struck the slope of Mount Pumacona, which has an elevation of 3,200 meters. The wreckage was located a few hours after the accident. All 28 occupants on board were killed in the impact.
Investigation Findings
The official investigation determined that the accident was a controlled flight into terrain, resulting from a navigation error committed by the flying crew. Several factors were identified as contributing to the incident: pilot error; the mental state of the pilot-in-command, which adversely affected his judgment and efficiency; poor air traffic control assistance; poor weather conditions characterized by low visibility; and inadequate navigation aids along the route.
These findings highlight the combination of human and environmental elements that led to the aircraft's deviation from its path and subsequent collision with terrain. The investigation did not specify the aircraft type, registration, or other operational details.