Hi Martin
Thanks for your reply.
After some more test flights:
I guess the FPS of the weather radar causes most of the stuttering.
After setting weather radar FPS to 1/5 of its maxValue the P3Dv5-stuttering is significantly less.
And nice, with 1/5 of its FPS the weather radar is still doing a good job.
PS:
The FPS of the TCAS does not really cause P3Dv5-stutters so far, even when almost at maxFPS.