On January 6, 1974, a Curtiss C-46 Commando (registration CP-990) operated by Servicios Aéreos Bolivianos - SAB was involved in an aviation accident near Unduavi, Bolivia in flight. 4 people were killed. Investigators recorded the probable cause as: The aircraft struck a mountainside while flying through inclement weather. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 3 related events involving the same aircraft type or operator are linked below.
A cargo flight traveling from San Borja to La Paz crashed into a mountainside during poor weather, resulting in no survivors.
What happened
On an unnamed date, a cargo aircraft was performing a flight from San Borlando to La Paz when it encountered adverse meteorological conditions. While navigating through the Unduavi region, the aircraft type impacted the slope of a mountain.
Following the impact, search and rescue operations were initiated to locate the wreckage and any potential survivors. These efforts continued for several days but were ultimately terminated after no evidence of the plane or its occupants could be identified. The debris from the crash was not discovered until August 1974.
Findings
There were no survivors of the accident.
The flight was operating in poor weather conditions at the time of the mountain impact.
Probable cause
The aircraft struck a mountainside while flying through inclement weather.