Majestic Software have released a statement on their Facebook page stating that “The Q400 is not yet supported on the Prepar3D V3.0 platform. Although it is possible to fly the aircraft, the known issues are: No cabin sound and also often stuttering of the aircraft from the outside view when in the air.

They also mentioned a few tweaks and adjustments will need to be made before it will be released as a new installer although once the appropriate fix becomes ready they will publish the announcement on their page. Although It’s not supported yet, it still works if you don’t wish to wait for the update yet.