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Ground School Systems 3 > PC21 Communication System > Flashcards

PC21 Communication System Flashcards

1
Q

What does the PC-21 provide audio communication between?

A

1) Both pilots
2) Pilot and ground crew
3) Own aircraft and other aircraft
4) Own aircraft and ground or airborne interrogators

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2
Q

Is there an ELT onboard?

A

Yes

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3
Q

What are the communication system components located in the avionics bay?

A

1) Audio Management Unit
2) UHF/VHF transceivers
3) ATC/ADS-B transponder
4) Emergency Locator Transmitter (ELT)

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4
Q

What antennas does the aircraft have and where are they located?

A

1) ELT antenna located in Vertical stabiliser
2) Upper and lower UHF/VHF Antenna
3) Upper and lower ATC/ADS-B transponders

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5
Q

What two transceivers does each UHF/VHF have?

A

Main transceiver and a guard receiver

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6
Q

What is the main transceiver used for ?

A

Normal transmit and receive operations

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7
Q

What is the guard transceiver used for?

A

Constantly monitors 121.5 and 243.0 MHz

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8
Q

How is the ELT activated?

A

G sensor which senses the longitudinal acceleration of the aircraft over a certain level and time period to prevent inadvertent operation of the ELT

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9
Q

How many static dischargers are there and what are their purpose?

A

21

- To discharge static electricity built up in flight that can interfere with HF or VHF transmissions.

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10
Q

What are the cockpit related communication system controls?

A
  • COMM panel on the right console
  • Decouple panel just above the right hand MFD
  • ELT remote control panel on the rear of the right console
  • PTT switch on the PCL
  • Instructor switch on the left console
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11
Q

What displays is comm information shown?

A
  • UFCP
  • FMS
  • Left and right MFDs
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12
Q

What comm controls are in the front that aren’t in the rear?

A
  • Instructor switch

- ELT remote control panel

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13
Q

What does the Stude Mute function on decouple panel allow the instructor to do?

A

Transmit on COMM2 without the student hearing what is being said.

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14
Q

What switches are on the COMM panel?

A

1) PTT switches
2) Event button
3) AMU channel selector

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15
Q

What is the main overarching purpose of the AMU?

A

Controls the audio messages for all communication functions.

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16
Q

What signals does the AMU handle?

A

1) UHF/VHF radios
2) Intercommunication between front and rear cockpit and with ground crew
3) Aural Warning Tones

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17
Q

Where does AMU receive inputs from?

A

1) Dedicated warning panel

2) RIOCs 3 and 4

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18
Q

How does the AMU prevent the transceivers from being damaged?

A
  • By transmitting and receiving on the same frequency at the same time.
  • The radio that is not transmitting is désentoiles during a transmission.
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19
Q

What are the three channels on the AMU?

A
  • Channel 1
  • Channel 2
  • Channel 3
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20
Q

What does Channel 1 do?

A

Controls the front cockpit audio signals

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21
Q

What does channel 2 do?

A

Controls the rear cockpit audio signals

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22
Q

What does channel 3 provide?

A

A backup function

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23
Q

How can ground crew headsets be connected?

A

At the ground crew socket in the avionics bay or at the left wingtip.

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24
Q

Where are the pilot headset connectors?

A

Attached to the pilots seat harness in each cockpit

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25
Q

What is provided for use Incase that the normal communication equipment fails?

A

Emergency headsets.

- located in a bag attached to the left side wall.

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26
Q

Which transceiver is for comm 1 and where is it located?

A

COMM 1

- located on the bottom of the fuselage

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27
Q

Where is number 2 transceiver located?

A

Upper antenna and for comm 2

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28
Q

What controls both transceivers ?

A

The UFCP or the FMS

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29
Q

What are the selectable frequency ranges for both transceivers ?

A

30 to 409 MHz

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30
Q

When will transmission and reception exceed a range of 100 NM direct line of sight?

A

When used within the 118 to 499 MHz band.

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31
Q

How is squelch functionality selected?

A

By aircrew via the UFCP.

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32
Q

How are signals transmitted and received when the aircraft is in the air for ADS-B?

A

Alternates between upper and lower antenna when the aircraft is airborne.

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33
Q

When is lower ADS-B transponder disabled?

A

When Aircraft is on the ground.

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34
Q

What occurs with ATC transponder when the pilot ejects?

A

Automatically set to ON and to transponder code 7700 by the MC.

35
Q

What international emergency frequencies does the ELT transmit on?l and for how long?

A
  • 406.025 MHz for 24 hours

- On 121.5 and 243.0 MHz for a max of 100 hours

36
Q

What occurs to ELT transmissions?

A

A satellite system receives these signals and forwards them to ground stations, which calculate the approx position of the aircraft.

37
Q

How is Number 1 transceiver (COMM 1) powered ?

A

From the BATT BUS

38
Q

How is Number 2 transceiver (or COMM 2) powered?

A

From GEN 1 BUS

39
Q

How is AMU powered?

A

With 28V DC from the BATT BUS and GEN 1 BUS

40
Q

How is ATC/ADS-B transponder supplied with electrical power?

A

From BATT BUS

41
Q

How does main PTT switch on PCL operate?

A
  • Press down on left part to transmit on COMM 1 only
  • Pressing down on right part to transmit on COMM 2 only
  • Press on centre to mute app incoming comm and radio navigation aids to both pilots earphones
42
Q

What occurs if a PTT switch is operated continuously for more than 45 seconds?

A

The AMU stops the transmission

43
Q

What occurs if the mute function is operated for more than 45 seconds?

A

The AMU restores the audio and navigation volume levels.

44
Q

Can only one pilot at a time transmit over any one radio?

A

Yes.

45
Q

Can both pilots transmit simultaneously over DIFFERENT radios?

A

Yes.

46
Q

What does the EVENT button on the COMM panel do?

A

Records and event to the Pilot Memory Module (PMM)

47
Q

What does the AMU channel selector in the NORM position mean?

A
  • Channel 1 for front cockpit

- Channel 2 for rear cockpit

48
Q

When student mute function is activated, how long is it active?

A

For 1 minute.

49
Q

How is audio volume of COMM 1, COMM 2 and the intercom controlled?

A

On the rotary knobs labelles C1, C2 and I/C on the UFCP

50
Q

When does the FMS Control the audio volume?

A

Only when the mission computer is unserviceable

51
Q

How are UHF/VHF transceivers controlled?

A

When mission computer is operating, controlled through the UFCP only.

52
Q

What occurs when the COMM MMS key on the UFCP is pressed?

A

Dedicated communication ODS selections are enabled.

53
Q

What does an asterisk to the right of the appropriate radio designator indicate?

A

The pilot is transmitting in the respective radio.

54
Q

How can the pilot change the frequencies on the UFCP?

A

1) Press the COMM button on UFCP
2) enter frequency into scratchpad
3) press enter
4) press either C1 or C2 to change the frequency

55
Q

What does the ASN/SQ ODS key on the UFCP COMM page do?

A

Frequencies can be assigned to channel numbers and the squelch function of COMM 1 and COMM 2 can be selected ON or OFF

56
Q

How is the ATC transponder controlled when the mission computer is operating?

A

Through the UFCP

57
Q

What transponder data is shown on UFCP when the TPDR is pressed?

A

1) Transponder code
2) Transponder Mode
3) Transponder Standby Code

58
Q

How is the transponder code entered?

A

Typing the code into the standby area and then pressing the code key to transfer the code to the active window for transmission

59
Q

What default settings are applied to the transponder when the weight is on wheels?

A

1) Power mode, Standby
2) Mode AC + S
3) Active code 5000
4) Standby code set to the code available before last shutdown
5) ADS B out set to MIl

60
Q

What does the transponder do in standby mode? How it it changed to not standby mode?

A

Does not broadcast any data.

Pilot needs to change it out fo standby mode.

61
Q

What occurs if the transponder is set to ON while on the ground? What occurs once in the air?

A
  • The transponder will ne set to ON but wi not reply to interrogations.
  • After take off, it will automatically transition to full operation.
  • on landing it will revert to pre takeoff state but will remain on.
62
Q

What are the three ADS-B modes of operation through the UFCP?

A
  • OFF
  • MIL (default mode)
  • IFR
63
Q

What does the transponder send out when in IFR and MIL mode?

A

The transponder automatically transmits mode S extended squatter messages every 2 to 3 seconds.

  • ICAO identifier
  • On ground or airborne status
  • Position
  • Altitude
  • Velocity
  • Track
64
Q

What is the difference between MIL and IFR modes for the transponder?

A
  • In MIL mode, no ADSB DGRD caution will be displayed when a malfunction is detected.
  • Instead a grey ADSB DGRD advisory will be displayed when the malfunction lasts for > 60 s
65
Q

Are malfuctions stil broadcasted to the pilot when in TPDR standby mode?

A

Yes

66
Q

How is the transponder controlled if the mission computer or UFCP fails?

A

Through FMS

67
Q

What occurs when the FMS radio key is selected? What is displayed on this page?

A
  • FMS radio page is displayed.

- Active frequencies and codes are shown on this page for COMM 1, COMM 2, NAV 1, NAV 2 and TPDR

68
Q

What colour is active codes displayed in FMS? What colour is Standby? What does yellow mean?

A 
Cyan = active
Green = Standby 
Yellow = malfunction
69
Q

What does the bottom row of FMS radio function show?

A

Volume settings

70
Q

How is the MFD FREQ page accessed?

A

Through the MFD SYS page

71
Q

What does the MFD FREQ page display?

A

Status of

  • Intercom
  • COMM 1 and 2
  • NAV 1 and 2
  • TPDR
  • TACAN

Lower half shows the list of oreset channnels, frequencies and trigrams that are available throu the current tmission.

72
Q

Are there comm controls on the frequency page?

A

No

73
Q

After ELT switch has been set to TEST/RESET, what does 1 long flash indicate?

A

ELT system operates correctly

74
Q

After ELT switch has been set to TEST/RESET, what does a series of flashes indicate?

A

The ELT system is unserviceable.

75
Q

What are the consequences of a front cockpit UFCP failure?

A

1) COMM 1 and COMM 2 radios cannot be controlled through the front UFCP
2) Both radios can be controlled through the FMS, or if the mission computer is still on, through the rear cockpit UFCP
3) Front cockpit radio and intercom volumes cannot be controlled but remains as last set
4) Intercom continues to operate

76
Q

What occurs to the comm system when the mission computer fails?

A

MFDs and UFCPs are lost

- FMS and COMM panel and PTT switch are still available.

77
Q

When can the FMS only take over control of the radios?

A

When the mission computer is shutdown or lost

78
Q

What occurs if AMU channel 1 fails? What should the pilot do?

A

The amber AMU 1 Fail caution is displayed on the MFD.

  • Communication from front cockpit is lost
  • front pilot should set the AMU channel selector to AMU Backup
79
Q

What should be done when both AMU 1 and AMu 2 fail?

A

Both pilots should select AMU backup

80
Q

What should be done when AMu 1 and AMU 3 fail?

A

Either pilot can select AMU knob to Oberrride which will give them control of Channel 2

81
Q

What occurs if all three audio channels fails?

A

Voice communication from front and rear cockpit including intercom fails.

82
Q

What occurs when RIOC 3 fails?

A

COMM 1 Radio is lost and the related frequency, monitoring and squelch indications on the MFD frequency page are replaced by red crosses

83
Q

What occurs when RIOC 4 fails?

A

COMM 2 is lost , red crosses on MFD freq pages

Ground School Systems 3 (17 decks)

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