What are you using to view FBX files?
I tried using FBX 2013.3 Converter, but could not Orbit, see:
You can go back and forth between Civil 3D and AIM with FBX. You can import FBX into Civil 3D. What exactly are you wanting to do?
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Aftre completing a model in AIM I would like to make it available to people to explore/view the model. The target audience will not have Infrastructure modeler.
I found that FBX can be viewed with FBX Converter 2013.3 ( a free converter / viewer from Autodesk). It looks pretty good. I was able to pan and zoom in FBX Converter but I could not Orbit - posted a question the AREA forum - no reply yet.