Communications

Question 1

What are major components of the radio management system (RMS)?

Answer 1

Two integrated navigation units, two integrated communication units, two radio management units (RMUs), one tuning backup control head (TBCH), and three digital audio panels (DAPs)

Question 2

Which Teo separate modules make up the integrated communication unit?

Answer 2

A VHF communication transceiver module and an ATC transponder module

Question 3

What are the modules that make up the integrated navigation unit?

Answer 3

The VHF navigation receiver module (VOR, localizer, glide slope, and marker beacon receiver), the ADF module, DME transceiver module, and audio digitizers

Question 4

What is the purpose of the TBCH?

Answer 4

The tuning backup control head (TBCH) can operate as stand-alone control unit or backup third control providing alternative means of tuning COM 2 and NAV 2

Question 5

Which system is used to send/receive signals to/rom the flight deck, attendant handsets, passenger entertainment, and pe-recorder announcement systems.

Answer 5

PA systems

Question 6

Which displays are shown on the RMU main page?

Answer 6

COM and NAV frequencies, ATC, TCAS, and ADF

Question 7

How can the ramp attendant communicate with the flight crew?

Answer 7

Through the Inter phone system by pressing the cockpit call button, which activates a chime in the flight deck headphones and speakers

Question 8

How many hours of recorder information does the CVR retain?

Answer 8

The most recent 2 hours in solid-state crash-survival memory

Question 9

When is the CVR energized, and how can it be erased?

Answer 9

Whenever the essential bus is energized, and on the ground with the parking brake applied

Question 10

What indicates a successful self-test of the CVR?

Answer 10

1-sec activation of the status LED on the control panel

Question 11

What does the EMERGENCY button on the TBCH do?

Answer 11

In EMRG mode, the RMS will only accept NAV and COM tuning via the TBCH, ignoring the RMUs

Question 12

What effect will losing the primary radio system bus (RSB) have on the Com systems?

Answer 12

There is no longer the ability to cross-side tune the RMU, and the TCBH becomes inoperative

Question 13

What is the indication that an RMU has been cross-side tuned?

Answer 13

The frequencies will be shown in amber

Question 14

How would you change to direct COM tuning on the RMUs and disable the pre-set frequency line?

Answer 14

Depress the line select button for 3 sec.

Question 15

To transmit through the oxygen mask microphone, which button on the DAP must be selected?

Answer 15

Boom/Mask selected to mask

Question 16

Which buses supply power for the VHF frequencies on RMU 1 and 2?

Answer 16

RMU 1 VHF is on essential bus 1, and RMU 2 VHF is on DC bus 2

Question 17

In an electrical emergency, which RMU should be used for COM/NAV and which for the navigation page?

Answer 17

No. 1 RMU for Comm/NAV and No. 2 RMU for navigation

Question 18

What do amber dashes on No. 2 RMU indicate?

Answer 18

Power to the No. 2 RMU VHF frequencies has been lost

Question 19

What is the function of the EMER button on the DAP?

Answer 19

The pilots button hard-wires the Captain to Com1/Nav1, and the co-pilot button hard-wires the First Officer to Com2/Nav2 in the event of power failure to the DAP. All other buttons on the affected DAP will be disabled.

Question 20

What are the available RMU pages?

Answer 20

• Radio page
• NAV and COM Memory pages
• Navigation Backup page
• Engine Backup pages 1 and 2
• SYS Select page (COM band options)
• Maintenance page
• HF Control and Memory pages

Question 21

If IC-600 No. 1 fails, which page is automatically shown on RMU No. 1?

Answer 21

Engine backup page

Question 22

How is the active frequency shown in the upper line of the COM or NAV window switched with the pre-set frequency shown in the lower line?

Answer 22

Press the top left bezel panel button for NAV or top right for Com

Question 23

What is the purpose of the digital radio system buses (RSBs)?

Answer 23

Control and information exchange between all the components of the RMS (Except the DAP)

Question 24

What is the function of the side-tone knob on the DAP?

Answer 24

Prevents undesirable feedback of speaker side-tone audio into the microphone