Communications

Question 1

Recall the function of the AUDIO SWITCHING selector.

Answer 1

❇️ Permits selection of ACP 3 by either pilot in the event their respect ACP has failed.
❇️When CAPT 3 or F/O 3 has been selected, “AUDIO 3 XFRD” appears on the memo section of the E/WD.

Question 2

How are flightdeck oxygen mask microphones are activated?

Answer 2

❇️Activation:
▪ Occurs by opening the mask’s storage compartment’s left-hand door. ▪ A white OXY ON flag indicates that the microphone is enabled.

Question 3

How are flightdeck oxygen mask microphones are de-activated?

Answer 3

❇️De-activation:
▪ Occurs by closing the respective compartment’s left-hand door, and then pressing the PRESS TO TEST AND RESET button.

NOTE: Oxygen mask microphones are available for the Captain’s, First Officer’s, and 3rd occupant’s oxygen masks. The 4th occupant’s oxygen mask microphone is not operational.