Communications

Question 1

Is the PA system available on battery power?

Answer 1

Yes, powered by the Battery Bus

Battery switch must be ON

Question 2

Where are the audio systems for the flight deck located?

Answer 2

ACPs are located on the center pedestal and aft overhead panel

PA mic located on the center pedestal

Radio units located in E/E bay

Question 3

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

Answer 3

NORM – Normal ACP functionality

ALT – Degraded ACP functionality
–Can only transmit on boom and oxygen mask microphone
–Can only transmit on 1 radio (ACP1/3 VHF1; ACP2 VHF2)
–Hand mic inoperative
–Cannot make PA through ACP, use PA hand mic
–Speaker inoperative, no altitude, GPWS, or windshear alerts if both in ALT

Question 4

What does the service interphone switch do?

Answer 4

Connects external service interphone headset jacks to the service interphone

Question 5

What does the VHF test switch do?

Answer 5

Removes automatic squelch feature

Improves reception of weak signals

Question 6

What is the indication if tuning the offside radio tuning panel (RTP)?

Answer 6

White Offside Tuning Panel light illuminates

Panel is tuning a radio not normally tuned by respective panel

Question 7

What are the failure messages displayed on the radio tuning panel (RTP)?

Answer 7

FAIL/FAIL - Respective radio has failed

PANEL/FAIL - Radio tuning panel has failed

Question 8

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

Answer 8

Do NOT key HF while fueling!

Do NOT key HF when personnel w/in 10’ of vertical stabilizer
–Ensure AFT service doors CLOSED

Question 9

What is a successful HF radio test?

Answer 9

Able to hear voice or tone (on 5kHz, 10kHz, etc)

Antenna tunes within 7 seconds

Question 10

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

Answer 10

VHF DATA, then

SAT DATA, then

HF DATA

Question 11

What is the notification of an incoming SAT phone call?

Answer 11

Aural SECAL chime, again after 16 seconds (if unanswered)

Select ANSWER on MCDU SAT menu

Question 12

How is communication established using the oxygen mask?

Answer 12

Mic selector switch to MASK and turn speaker on

Automatic in MAX

Question 13

How can the flight deck alert the ground crew?

Answer 13

GRD CALL switch on overhead panel

Sounds nose wheel well horn

Question 14

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

Answer 14

PA mic on center pedestal,

PA through Audio Control Panel,

F/A interphone (press 8)

Priority as listed, flight deck has priority over F/As

Question 15

What does the ATTEND button do?

Answer 15

Two-tone chime in cabin

Pink call light in cabin

Question 16

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

Answer 16

Extinguishes and resets the SELCAL light

Unable to receive another SELCAL until reset