Communications Flashcards

1
Q

How do you adjust the volume of the aural warning system?

A

not adjustable

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2
Q

With the radio transmit (R/T) - intercom (I/C) switch in the I/C position, where can your intercom transmission be heard?

A

At all interior and exterior interphone units.

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3
Q

What is the purpose of Voice/both switch?

A

BOTH : hear the Morse code and voice messages from the station.

VOICE: filters out the Morse code

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4
Q

Where is the observer overhead speaker located?

A

The observer seat does not have a speaker; audio control panel speaker knob is inoperative.

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5
Q

Explain the EMER/NORM switch on the ACPs

A

If the pilot were to select EMER, his headset wi11 be
directly connected to NAV 1 and VHF 1.

The aural warning system will be operable.

If the co-pilot selects EMER, his headset is connected directly to NAV 2 and VHF 2.

All ACP services are lost except for NAV 2 and VHF 2.The switch on the observer’s ACP is disabled

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6
Q

When do you need to select the EMER position?

A

When there is a failure of the audio integrating system,

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7
Q

What happens to circuit breakers in the system when EMER position is selected?

A

electronic circuits of the audio integrating system to be bypassed and most of the ACP functions will be inoperative.

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8
Q

Explain the public address system (PA) priority

A
  1. Pilots
  2. FA

Pilots can override the FAs PA.

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9
Q

How do you adjust the speaker volume in the cabin, lavatory and galley?

A

adjusted automatically based on the background noise.

It is at full volume when the APU or an engine is running.

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10
Q

What would you do if the FA told you that the speaker in the galley was not working when she made her PA?

A

The galley speaker does not work when PA’s are made from the FA’s station.

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11
Q

Where is the inter phone control unit located?

A

located on the center pedestal

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12
Q

interphone control unit. how many switches? how can you select a mode?

A

and has four switch lights:

PA
CHIME
CALL
EMERG

Only one mode can be selected at one time.

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13
Q

How would you make a PA to the cabin?

A

The ACP transmit switch should be selected to PA,

then press the PA switch light.

Either the R/T switch on the control wheel, the ACP R/T switch or the handheld microphone can be used to make the PA.

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14
Q

What occurs when the CALL switch light is pressed?

A

The switch light illuminates green and there is an aural high-low chime.

A red light illuminates on the overhead exit sign in the middle of the cabin

the FLT light illuminates green on the FA’s handset cradle.

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15
Q

Explain the EMER switch light on the interphone control unit.

A

It is used to notify the FA of an emergency condition.

When pressed the switch light flashes amber and there is an aural high-low chime.

There will be a red flashing light on the mid-cabin overhead exit sign

the amber EMG light flashes on the FA’s handset cradle.

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16
Q

When the FA calls the flight deck, what should be selected to activate communications?

A

Select PA on the ACP mic selector switch

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17
Q

At what locations can maintenance use the interphone system to talk with the pilots?

A
  • Avionics bay
  • Aft equipment bay
  • Refuel/ defuel control panel
  • External service panel
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18
Q

Explain the MECH PUSH switch light

A

This is a call function between the flight deck and the external service panel and the aft equipment bay.

There is a switch light on the three panels will illuminate when one switch is pressed.

It will be accompanied with an aural two-tone in the cabin. The lights remain on for 30 seconds.

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19
Q

What is the purpose of the backup tuning unit?

A

This radio provides control of COM 1 and NAV 1 If we lose AC Power

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20
Q

What is RTU?

A

Radio Tuning Unit

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21
Q

What system controls are available on the RTUs?

A
VHF communication radios 
VHF navigation radios 
TCAS
Transponders
ADF
Optional HF radio
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22
Q

What is TCAS Mean?

A

Traffic Alert and Collision Avoidance System

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23
Q

Explain the two pages of the RTUs.

A

The RTU has a top page and a main page. The top page allows basic changes to the VHF radios, transponder, ADF and the main page is dedicated to a specific navigation, TCAS or communication system.
Pressing the associated button twice activates Main page.
Example: Press the RTU TCAS button twice to access the TCAS main

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24
Q

What is 1/2 button on the RTU.

A

This button is the RTU cross-side tuning button. ‘
The RTUs are normally set up for on-side control of the radios. The 1/2 key allows one RTU to display and control the other side.

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25
Q

Color of 1/2 button Cross-side information and how to go back to normal side?

A

Cross-side information is in yellow. Pushing the 1/2 key a second time will return the radio to a normal on-side display.

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26
Q

When do you use the 1/2 button on the RTU

A

This feature is used when an RTU fails but the radio and navigation functions still work.

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27
Q

RTU failed: what would it look like?

A

The display would be blank and cross-side tuning would be inoperative

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28
Q

What would you do if your RTU fails

A

Cross side tuning needs to be established and inhibiting the failed RTU can do this.

select the RTU INHIBIT switch for the failed RTU.

Both radios are available but cannot be shown on one RTU at the same time. The 1/2 button achieves switching between the two radios.

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29
Q

What happens when you select the RTU INHIBIT switch for the failed RTU.

A

Cross-side tuning is now available and can be activated by pressing the 1/2 on the serviceable RTU.

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30
Q

Explain the STBY position of the backup tuning unit.

A

In this position the backup tuning unit is in standby. The frequencies will duplicate COM 1 and NAV 1 frequencies

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31
Q

When would you use the backup tuning unit?

A

When both RTUs and the FMS fail or there is a complete loss of AC power.

32
Q

Besides the RTUs and the backup tuning unit, where can the radio frequencies be changed?

A

On the FMS radio tuning page

33
Q

Explain the FMS TUNE INHIBIT switch.

A

When in the INHIBIT position, the remote tuning function of the FMS is inhibited. This may be needed if the remote FMS control malfunctions.

34
Q

Where is the Cockpit Voice Recorder (CVR) located?

A

The CVR is located in the tail section of the airplane.

35
Q

What four locations are recorded on the CVR?

A
  • Pilot station.
  • Copilot station
  • Area microphone in the cockpit.
  • Mixed PA audio and the observer station.
36
Q

How long does the CVR record?

A

There are two types, 30 and 120 minutes. At the end of the cycle it will re-record

37
Q

When does the CVR start recording?

A

When electrical power is applied to the aircraft.

38
Q

Explain the CVR test button.

A

When pressed it completes an internal test of the CVR system.
To test; hold the button for 5 seconds and a successful test is indicated by illumination of the green light in the button during the 5 seconds.

39
Q

What is the function of the headset jack on the CVR control panel?

A

To monitor the recording tone during the test.

40
Q

Where is the flight data recorder unit (FDR) located?

A

The FDR is located in the tail section of the aircraft.

41
Q

What does the FDR record and for how many hours?

A

It records the last 25 hours of aircraft and flight parameter data.

42
Q

When does the FDR start recording?

A

Beacon is ON
Strobes are ON
Weight off wheels

43
Q

What is the purpose of the FDR EVENT switch?

A

This will highlight an event on the FDR.
The highlight is accomplished by pressing the FDR EVENT switch for 2 seconds, which will then display a green FDR EVENT advisory status message.

44
Q

How Many radios do we have?

A

There are two radio tuning units are used to frequency tune the radios.

45
Q

What is back-up standby tuning unit?

A

Back up unit the event of a failure

46
Q

What is cockpit voice recorder?

A

All incoming, outgoing and internal communications are recorded on the cockpit voice recorder.

47
Q

What is service interphone system?

A

provides intercommunication between service and maintenance areas and the flight compartment.

48
Q

Where are the three audio control panels?

A

in the center pedestal,

49
Q

What is the purpose go the A radio transmit (R/T) and intercom (I/C) switch?

A

is used to transmit on the radios or passenger address system.

50
Q

Hot mike, where is it provided?

A

Continuous (“hot mike”) conversation is provided in the I/C position for the intercom systems.

51
Q

Explain the MASK/BOOM switch?

A

gives the flight crew a choice between headset with boom mike (or hand mike) with BOOM selecte

or the oxygen mask microphone, when MASK is selected.

52
Q

Process of Flight attended is calling pilots

A

1) presses the FLT or the EMG button.
2) This will illuminate the CALL or EMER light on the intercom control panel and sound a high-low chime on the flight compartment speakers.
3) When PA is selected on the intercom control panel, and the RT/IC switch, on the control wheel, is set to IC, two-way conversation is established.
4) The galley speaker is muted when a flight attendant’s handset is activated.

53
Q

What is the radio Transceiver tuning range

A

118.000 to 136.975 MHz.

54
Q

What are the alterantive Frequency tuning can also be done?b

A

1) backup standby tuning unit

2) the FMS control display unit.

55
Q

Radio Tuning Unit:
RTU 1 Contols
RTU 2 Controls

A

RTU 1 monitors and controls COM 1

RTU 2 monitors and controls COM 2.

56
Q

What happens if the In the AC power loss of both radio tuning units?

A

the backup tuning unit provides reversionary control of COM 1

57
Q

What happens If no entry is made on the main page within 20 seconds?

A

radio tuning unit display will return to the default top level page.

58
Q

Squelch meaning?

A

muting a channel when there is nothing on it to prevent hiss of white noise

59
Q

Do we keep squelch on?

A

Yes Sir

60
Q

the frequency indication is replaced by white dashes. What is going on?

A

if any discrepancy is detected between the commanded frequency and the actual tuned frequency, the frequency indication is replaced by white dashes

61
Q

What happens When the backup tuning unit is switched on?

A

it takes over control of the left side VHF COM 1 and NAV 1, and overrides all other controls.

62
Q

What is the purpose of Radio tuning unit inhibit switches?

A

on the backup tuning unit, are used to disable a failed primary radio tuning unit.

63
Q

Where do you control the HF?

A

Top Level page of RTU No. 2

64
Q

Purpose of Data Communications Unit?

A

Reduces the work load and increases the data integrity

65
Q

Data Communications Unit consist of?

A

Airborne Communications Addressing and Reporting System (ACARS)

66
Q

Airborne Communications Addressing and Reporting System (ACARS) : where can you control it?

A

MENU pages on the FMS CDU.

67
Q

How does ACARS work?

A

Request ATIS: Send the VHF (or SatCom) to ground antenna (Downlink). From there to station. From station to plan (Uplink). (weather-Flight Plan-Updated wind forcast-Clearances) Provides information about phases of the flight.

68
Q

What does ACARS consists of?

A

Communications Management Unit (CMU)

Aircraft Personality Module (APM).

69
Q

What is the purpose of Communications Management Unit (CMU)?

A

central processing and routing computer.
gathers aircraft data from the various systems such as: aircraft tail number, flight number, departure station, etc. for use in the downlink messages and for event detection.
The system allows the aircraft to locate and acquire a ground station for communications
The transponder, which provides the aircrafts unique ICAO address (Mode S).

70
Q

What information can be Transmitted on ACARS?

A

Text weather data
ATC messages and clearances
Operational messages

71
Q

ACARS: purpose of Aircraft Personality Module (APM)

A

memory unit which stores: tail number, ICAO address, aircraft type and configuration.

72
Q

What is The SELCAL (SELECTIVE CALL SYSTEM)?

A

ground stations equipped with SELCAL can call individual aircraft

73
Q

SELCAL helps pilot?

A

This eliminates the necessity of continuous monitoring of routine radio signals.

74
Q

What is assigned to aircraft for SELCAL?

A

Each aircraft is assigned its own SELCAL code when the decoder is installed in the aircraft.

75
Q

How do you know If you are receiving a SELCAL Message?

A

A green SELCAL VHF advisory message will be displayed on the EICAS status page and a “SELCAL” oral message will be heard through the speakers and headsets.