SkySimulations has announced their DC-9 has been updated to support Prepar3D V4.
If you have already got the P3D version, you would have the upgrade for free.
On top of P3D v4 Compatibility, the following areas have also been updated for better performance:
- New aircraft systems
- New electrical system
- New hydraulic system
- New autopilot
- New audio system
- Increased performance.