I had flown to SYD with my wife on Pan Am for a month-long vacation (those were the days) on Worldpass miles -- the condition of which was taking the IAD-LAX-HNL-AKL-SYD route, no non-stop LAX-SYD allowed. A day or two before our return - UA took over the routes. I called to reconfirm and asked if we could be changed to the SYD-LAX 747-SP flight previously not allowed. No problem. The aircraft sported a rapid paint job that covered the Pan Am meatball with a layer of white. (I have a pic somewhere). The interior was un-changed and serving items were from both PA and UA. The SP - an interesting aircraft, but that's another story.