Can't remember the year, but I was about 12 years old (about 1990 I suppose). Delta Airlines 727-200, service from Calgary AB Canada to Los Angeles, with a stop in Salt Lake City. Visited the flight deck in Salt Lake on both trips, and was fortunate enough to sit in the Captains seat, on the ground for one of the stops. I've been hooked on aviation ever since. Sure do miss the old 727 aircraft.