Originally Posted by
Raptor71
Hi guys,
( I/C: NORMAL POSITION, allowing you to hear and speak to your colleague (and the cabin crew when they call) without having to do anything with the transmitter switches when you use your boom set
You infer to its NORMAL POSITION, when this is actually not the normal case.
It is a Boeing modification to enable the I/C to "stick" in I/C, some older 737's have the spring loaded version still installed. This required crew who insisted in the use of the I/C for NORMAL communication to use elastic bands or similar to hold the button in the I/C position...
The NORMAL POSITION is the neutral middle position, not transmitting on either I/C or ACP selected channel. It also allows ground crew connected not to listen into your conversation in flight deck (even when your headset may be off it will still continue to transmit
)