Votec was the biggest Latin America heli operator in the 70s when they also started a regional airline operation, purchasing DC-3s (C-47s originally from Brazilian Air Force) that were completely modernized and served the amazonic routes starting from the late 70s.
Kept in good conditions and free from mishaps, despite serving one of the less forgiving areas of the continent, all DC-3s were later sold to private operators from 1985.
Curiously the IATA code "JJ" from Votec are still active through Latam including transoceanic flights due to to the intermediation of TAM that suceeded Votec and Brasil Central.