This freeware package, produced by Military AI Works, contains the HTAI Bombadier Learjet C-21A, created by Henry Tomkiewicz and converted for P3Dv4 by the team of AIG. The converted model should give you better frame rates in P3D and ensures that the HTAI Bombadier Learjet C-21A displays correctly in P3Dv4.
Together with the converted models, this package also contains converted textures for all related paints that MAIW ever released. We have converted the textures to DDS format with DXT3/5 compression and mipmaps for the best possible performance.
Read the included readme for more information and installation instructions.