Adria Airways Douglas DC-6B senn at JFK was an ex KLM Arlines Registered PH-TFH and operated by them from 1961 to 1971 Adria Aviopromet was founded in March 1961. It acquired four used DC-6B aircraft from the Dutch airline KLM and operated its first commercial flight in August of the same year using a Dutch crew. The first flights with a domestic crew began in December 1961.