The aircraft used in the film is a Fairchild C-119, a direct descendent of the WWII era C-82 used in the original film
The model used for the crash sequence cost $250,000 and was so perfectly built it actually flew further than the crew and testing had predicted. In fact it flew so far it hit the camera filming it and broke the cameraman's leg.
The production transported three C-119 fuselages to Namibia where the film was shot. During transportation, a ferry carrying the fuselage and its trailer across a river sank and the parts had to be salvaged.
The production built a "Phoenix" that could be taxied, but were unable to safely build a flying version economically. Mindful of the original production which did build a "Phoenix" that could fly, but was structurally unsound and crashed killing stuntman Paul Mantz, the flying scenes were done using a radio controlled model and computer graphics.
Miranda Otto's character was not in the original version of the film.