NCO.IDE.H.190 Radio communication equipment

(a)Where required by the airspace being flown, rotorcraft shall be equipped with radio communication equipment capable of conducting two-way communication with those aeronautical stations and on those frequencies to meet airspace requirements.

(b)Radio communication equipment, if required by (a), shall provide for communication on the aeronautical emergency frequency 121,5 MHz.

(c)When more than one communication equipment unit is required, each shall be independent of the other or others to the extent that a failure in any one will not result in failure of any other.

(d)When a radio communication system is required, and in addition to the flight crew interphone system required in NCO.IDE.H.135, rotorcraft shall be equipped with a transmit button on the flight controls for each required pilot and/or crew member at his or her working station.