Without trying it this sounds like one of the early FS2002 aircraft created with FSDS1.* If you get that warning message always click the NO option. This should enable the gear animation but not animated turbines or props. If you already clicked YES, open fs9.cfg in Notepad. Find the aircraft listed under the [FrameCallNoWarn] header & change the value to 1. This tweak should do the same thing.
*PS. This confirms it. Copied from the file description on the download page.
Quote:works well in FS2004 ACOF - just one small snag engines are hollow in reverse mode, try and ignore and you should be O.K.