B373.mp4 Official

: The lower half of the switch displays a "C" to signal an incoming voice-only call.

Based on technical documentation for the (often referenced as B737-3 or similar in training file naming conventions like "b373.mp4"), a key communication feature is the VOICE ONLY select switch . b373.mp4

: Located at the hand microphone to indicate selection made. : The lower half of the switch displays

: Automatically activates the oxygen shut-off valve when the mask is removed from its stowage box. B737-300/400/500 Boeing: Communications 23 | PDF - Scribd b373.mp4