X-Plane 8 And 9 PZL-104 Wilga. This a re-issue of the PZL-104 Wilga. The flight characteristics have been improved and there is now a choice of liveries. V8.64 users should copy-paste the livery files to the main plane directory before opening the plane in X-Plane. Includes two object planes in the objects directory if you wish to include the plane in your sceneries. Original sounds by Dataroots. By Jacques Brault.