Hi all and thanks for responding.
@meh1951 „LED lights on Honeycomb Bravo” sorry, I don’t know how to put it any clearer 
@Vibstronium Yes I know about this mod but as you say yourself: PC-only 
@toasterovenX So it’s broken on PC as well? That’s bad news really!
The beta forum is not accessible any more but in the hardware section there were posts about this. One poster said that at least the landing gear indicators and one or two annunciator lights were working on one of the SU13-betas.
It would be nice if someone who knows facts could shed some light on this.
Regards,
Frank