Cruzeiro MD-82 PP-CJM Maddog X

In 1982, McDonnell Douglas tried to sell their MD-80 to the brazilian market, so they sent one plane, PP-CJM, to Cruzeiro for it (and it's parent company, VARIG) to test the feasibility. The plane remained for three months and apart from the small cargo compartment, it was overwhemingly approved by both companies, which went on to order 6 planes. Sadly, due to finnancial difficulties at the time, the deal fell through and no other MD-80 ever bore a brazilian reg for a brazilian airline.