(5) All radio communication and radio navigation equipment installed in an aircraft
registered in the United Kingdom or carried on such an aircraft for use in connection
with the aircraft (whether or not in compliance with this Order or any regulations
made thereunder) shall:
(a) be of a type approved by EASA or the CAA in relation to the purpose for which it
is to be used;
Part 3, Article 20.
Fuji, approved equipment fitted to the aircraft is one thing. Plugging in your Nokia and chatting to your mates or having your ears blasted out by "Highway to the Danger Zone" is another.
It is not good enought for ANYONE, no matter their level of experience or qualifications, to decide which rules they will follow and which they will not.