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4 fatalities

Cargo Flight Crash in Unduavi Region (CP-990)

Unduavi, BoliviaFlight

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. 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.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

A cargo aircraft crashed into a mountain slope in the Unduavi region during poor weather while flying from San Borja to La Paz. No survivors were found, and the wreckage was located in August 1974.

Incident Overview and Search Operations A cargo aircraft operating a flight from San Borja to La Paz encountered poor weather conditions while cruising. During this period, the airplane struck the slope of a mountain in the region of Unduavi. Search and rescue (SAR) operations were initiated following the incident but were suspended a few days later because no trace of the aircraft was found. The wreckage was eventually located in August 1974. There were no survivors from the crash. The source does not specify the aircraft type, registration, operator, or exact date of the accident, nor does it provide a probable cause.

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