Ok,guys,after all this insanities with gear animation I concluded that the problem is the software that I work with...
I modeled and animated my aircraft with Maya-all  works good except animation-.x exporter for Maya just  isn't able to export animations correctly...

I tried to use 3dStudioMax for this purpose-the same story-endless problems

Then I tried x.exporter for Newtek Lightwave3D-this one looks like something that not intended to export something more complicated than untextured box...

So,I have Gmax as well but I have no mdlexport plugin for it,and this seemes to be my only chance to finish building my laming bird...

So,is there any possibility to get this plug(I suppose it's free software?)

Or if I'm wrong is there anybody here who completely finished aircraft for MFS 2004 using any software except Gmax?

I have been exporting from 3dmax with no problems at all using the PandaSoft X Exporter. Once you get the setup right, it works like a charm. It is the only alternative for those who don't have FS2002Pro with the gamepak but have 3dMax 4x. The converter that Microsoft provides is a command line utility and way over my head but the PandaSoft X Exporter has a GUI and is simple and WORKS.

Lou