It wouldn't be that difficult to re-write the main 3D Game engine using OpenGL. If you had the assets (textures, models) in modern formats, one person could probably do it in a couple of weeks. Using another game engine would be quicker still.

But then there's the crucial gameplay, flight-sim physics, hooking into achieving objectives, the narrative, cutscreens, etc.

Even then, would it have the same feel as the original...