01/22/2007. Remarks by Jack McKillop: "This aircraft was built as a Model 340-31 and delivered to United Air Lines of Chicago, Illinois, USA, on May 15, 1953 registered N73134 and named 'Mainliner Portland'.

It was sold to the pharmaceutical company Johnson & Johnson of New Brunswick, New Jersey, on November 26, 1958 and they had it converted to a Model 580 in 1963 by replacing the two reciprocating engines with two Allison 501-D13D turboprop engines. (A total of 159 of the models 340 and 440 were converted to model 580).

On March 28, 1970, it was sold to a Canadian company and reregistered CF-BGY and then sold again in the USA in 1973 and registered N8EG. In 1974, it was sold to the Canadian Department of Mines & Resources for use by the Environmental Technology Center of Canada's Enviroment Department. The registration is still valid as of this date."