Accident Details
The aircraft was completing a special flight from Araracuara to Apiay Air Force Base, transporting convicts who had been released on parole, escorted by prison guards. While approaching Apiay under marginal weather conditions at an altitude of 11,500 feet, the airplane struck the slope of a mountain and disintegrated upon impact. All 31 occupants were killed.
Investigation Findings
The official investigation determined that the aircraft was off track by 10 degrees at the time of the accident, a deviation likely caused by strong winds. The absence of efficient navigation systems along the route was identified as a contributing factor, along with the poor weather conditions prevailing at the time.
Probable Cause
It was determined the aircraft was off track by 10° at the time of the accident, probably due to strong winds. The lack of efficient navigation systems along the route was considered as a contributing factor, as well as the poor weather conditions.