Communications

Question 1

Is the PA system available on battery power?

Answer 1

Yes! Powered on Battery Bus

Question 2

Where are the audio systems for the flight deck located?

Answer 2

Physical radios are located in the E&E compartment

Question 3

What is the purpose of the ALT-NORM switch on the ACP?

Answer 3

Allows use of radio in the event of a malfunction
Hardwires ACP1 to VHF1 and ACP2 to VHF2, ACP3 to VHF1
NORM-ACP = operating normally
ALT-ACP = operates in degraded mode (if you’re both in alternate, you will not get any
aural callouts (GPWS, etc))
SH 5.010 pg 4 & 8

Question 4

The Push-To-Talk switch, when toggled, transmits on which transmitter?

Answer 4

Whatever is selected

SH 5.010 pg 3

Question 5

What does the Service Interphone switch do?

Answer 5

Connect external headset jacks on the airplane (on the aft overhead panel)
SH 5.010 pg 10

Question 6

What does the VHF TEST switch do?

Answer 6

Removes Auto squelch feature - allowing background noise and potentially
aiding reception of weak signals
SH 5.010 pg 16

Question 7

What failure messages display on the RTPs, and what do they mean?

Answer 7

FAIL/FAIL = the selected radio has failed
PANEL/ FAIL = panel has failed
SH 5.010 pg 17

Question 8

What considerations should be made before keying the HF radio on the ground?

Answer 8

Do not key the HF Radio while the aircraft is being fueled/defueled. Injury to
personnel or fire may result. Aft service doors should be closed.
SH 5.010 pg 18

Question 9

What is the priority of source selection in the data mode?

Answer 9

VHF

• –> SAT PHONE
• ——-> HF

Question 10

What is the notification of an incoming SAT phone call?

Answer 10

aural chime - select ANSWER on SAT menu on CDU

SH 5.010 pg 23

Question 11

How is communication established using the oxygen mask?

Answer 11

select MASK and SPKR on ACP (mask will NOT activate speaker)

Question 12

How can the flight deck alert the ground crew?

Answer 12

GRD CALL switch (overhead panel) sounds horn in nose wheel well.
SH 5.010 pg 13

Question 13

How can a PA be made? Which ACP, hand mic, or interphone has priority?

Answer 13

Can use PA handset or standard microphone and related ACP (boom, oxymask,
handheld mic)
Flight Deck has highest priority overall - hand mic overrides ACP within the
flight deck
SH 5.010 pg 11

Question 14

What does the ATTEND button do?

Answer 14

two tone chime (bing bong!) in the pax cabin and illuminates both pink master
call lights.
SH 5.010 pg 13

Question 15

What does a SELCAL reset button do and when is it used?

Answer 15

extinguishes and resets the SELCAL light, used after a call
RESET otherwise you cannot use it or receive another SELCAL
SH 5.010 pg 27