The radio circuit-breaker panel is located on the right side of the radio and navigation control panel (Figures 1-5-5 and 1-5-6). Circuit-breakers may be reset by pushing them in. The DC radio operating circuits are energized from the No.1 and No.2 radio busses. The No.1 radio bus is energized by the essential bus and the No.2 radio bus is energized by the primary bus. The No.1 and No.2 RADIO MASTER switches control power to the radio busses.

The AC operating circuits, each protected by an appropriately marked circuit-breaker, are connected directly to the helicopters AC power system and are energized whenever the generators are operated or external AC power is applied.