Radios / Communications

Question 1

What does the VOICE / BOTH switch do

Answer 1

Switches the Morse Code ID on and off.
In the BOTH position, Morse Code is audible
In the VOICE only position, the voice is audible

Question 2

What does the EMER / NORM switch do on the audio control panel?

Answer 2

It is used in the event of an ACP failure.
It bypasses regular wiring and allows the use of VHF 1 and NAV 1 on the captains side,
And VHF 2 and NAV 2 on the FO’s side.

Question 3

What do you do if the switch breaks while in the PA position?

Answer 3

Use the EMER / NORM switch on the audio control panel.

Question 4

What does the 1/2 button on the RTU do?

Answer 4

It shows off-side information and allows yu to tune the off side radio from the other RTU

Question 5

If an RTU fails, how do you tune it?

Answer 5

You cannot off-side tune it until you depress the RTU INHIB button

Question 6

What does the RTU INHIB button do

Answer 6

It allows you to tune the off-side RTU in the case of a failure

Question 7

What is the FMS TUNE INHIB switch do

Answer 7

It prevents the FMS from using the auto tune feature in the event it malfunctions.