There a set of CAA requirements for entertainment systems in cockpits. I've not read them for a while, but in essence they say...
- There must be no entertainment display screen visible to aircrew
- The system must be designed so that it silences itself when transmitting or receiving on RT.
- Whatever's fitted must be crashworthy and be shown not to interfere with anything else on the aircraft.
The first is blindingly obvious, the second is fairly easy to achieve. The latter is going to be reasonably straightforward to approve on a permit aircraft such a Europa, but for a CofA aircraft the method of proof will be so burdensome that you'll wish you'd never tried.
G