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DO228 type rating > section 7-avionics > Flashcards

section 7-avionics Flashcards

1
Q

where can 2 electric fans be fitted to cool the avionics equipment?

A

LH and RH avionics racks

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2
Q

when do the avionics cooling fans operate?

A

whenever the 28V DC BUS 1 is enegerised

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3
Q

what protects the avionics cooling fans?

A

AVIONIC COOL/BUS 1 on the AC/DC breaker panel

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4
Q

can the avionics be operated individually if the avionic master circuit fails?

A

yes

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5
Q

what does the intercom system provide?

A

communication between pilots, and monitoring of all COM and radio NAV equipment installed in the airplane

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6
Q

what does the intercom system consist of?

A

2 microphone buttons, headset connections and 2 ICS EMERG switches on the pedestal panel

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7
Q

what powers the intercom?

A

28v DC

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8
Q

what protects the intercom system?

A
  • ICS 1/ESS BUS on the overhead breaker panel

- ICS 2/BUS 2 on the AC/DC breaker panel

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9
Q

what is the intercom operating temperature range?

A

-20-+55C

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10
Q

how do we transmit?

A

set the transmitter selector knob to the desired position and depress the. button on the control wheel

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11
Q

what mode is HOT MIKE not available?

A

intercom

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12
Q

how is communication receiver audio selected?

A

by depressing the appropriate communication selector button

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13
Q

can more than 1 comms receiver be selected for receiver audio?

A

yes

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14
Q

how are navigation recievers selected?

A

by depressing the appropriate navigation audio selector button

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15
Q

what if the VOICE button is pressed?

A

identification signals (morse code) are suppressed and the voice transmission is clear- when the button is released voice and identification signals are of equal strength

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16
Q

what is fed to the inter phone system when a warning light illuminates?

A

1kHz signal is fed to the inter phone

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17
Q

what must be pressed to allow the pilots to transmit without using the headsets?

A

SPKR

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18
Q

what does the ICS emergency switch do?

A

bypasses the normal ICS amplifier of the ICS control unit in case of amplifier malfunction by connecting the microphone directly to the selected communication system

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19
Q

what is the headphone connected to in the EMERG position?

A

the speaker amplifier instead of the phone amplifier

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20
Q

what must we do on the ICS panel if the ICS emergency switch is set to EMERG?

A

the SPKR button must be pushed in

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21
Q

what is not possible with the ICS emergency switch set to EMERG?

A

intercommunication between pilot and co-pilot

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22
Q

what will operation of the CALL button on either control wheel do?

A

trigger an audio signal to call the attention of the passengers with a 2 tone chime

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23
Q

what do we hear when the NO SMOKE and/or fasten seatbelt signs are either ON or OFF?

A

2 tone chime

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24
Q

what happens to signal and voice communication volume with either speed lever out of the LOW position?

A

volume will increase automatically

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25
Q

how are pax announcements made?

A

switching the transmitter selector knob to PA and depressing the MIC button

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26
Q

what does the ground clearance switch allow?

A

enables the pilot to await clearance from ATC with all equipment off except VHF COM 1 provided the avionics master switch is off

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27
Q

what are the 3 modes of the VHF communication system?

A

frequency, channel and direct tuning

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28
Q

how many preset frequencies can be recalled into the STBY display in channel mode?

A

9

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29
Q

what is direct tuning mode used for?

A

a backup allowing frequency changes to be made directly into the USE display

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30
Q

what does the VHF communication system consist of?

A
  • pedestal mounted receiver/transmitter
  • 1 VHF communication antenna for each system
  • interconnecting cables
31
Q

what protects the VHF communication system?

A
  • VHF 1/ESS-BUS on the overhead breaker panel

- VHF 2/BUS 2 on the AC/DC breaker panel

32
Q

what is the VHF transmitter power?

A

up to 16 watts

33
Q

what is the operating temperature range of the VHF communication system?

A

-20-+55C

34
Q

how do we activate the VHF communication system?

A

rotate the on/off/volume knob clockwise from the detented off position

35
Q

why should we switch on VHF comms after engine start?

A

to protect solid-state circuitry

36
Q

how to we use manual squelch?

A

pulling the volume control knob

37
Q

how do we know we are transmitting using VHF 1?

A

T indication

38
Q

how do we check the VHF system is in the desired mode?

A

pulling small frequency selector knob out

39
Q

what if a channel number is displayed in the USE display?

A

the VHF system is in channel mode

40
Q

what if a frequency is displayed in the USE display?

A

the VHF system in frequency mode

41
Q

how do we change the VHF mode of operation?

A
  1. press the frequency transfer button for approximately 3 seconds until a flashing channel number is displayed in the USE display
  2. pull out the small frequency selector knob and rotate it until a flashing zero is displayed in the USE display. the STBY display shows — or uuu
  3. to select frequency mode, select — in the STBY display and press the frequency transfer button. a frequency is displayed in both displays
  4. to select the channel mode, select uuu in the STBY display and press the frequency transfer button. a frequency is displayed in both displays
  5. to select the program mode in order to change the frequency of a preset channel, select uuu in the standby display
42
Q

what is the HF system capable of?

A

receiving and transmitting on any 0.1khz between 2000 and 26,999.9khz

43
Q

how many frequencies can be preset for fast selection during flight on the HF communication system?

A

99

44
Q

what does the KHF 950 HF system utilise?

A

an LSI (large scale integration) microprocessor and a frequency synthesiser.

45
Q

what does the HF system transmit with?

A

100 watt of peak envelope power in single sideband.

46
Q

what is the average power of the HF on AM?

A

25 watt

47
Q

what are the HF systems 2 possible modes?

A

upper and lower sideband (A3J) and AM (A3H)

48
Q

what does the HF system consist of?

A
  • 2 KCU 951 panel-mounted control units
  • 2 KAC 952 remote power amplifier and antenna couplers
  • 2 KTR 953 remote recivers/exciters
  • 2 bridging amplifiers
  • 1 dual antenna adapter
  • 1 HF 1/2 selector switch
  • 1 antenna
49
Q

what protects the HF communication system?

A

HF1/BUS 1 on the AC/DC breaker panel

HF2/NON ESS BUS on the LH avionic rack breaker panel

50
Q

what is the operating temp range of the HF system?

A
  • remote units -55C to 70C

- control/display -20C to 70C

51
Q

what does the HF 1/2 selector switch do?

A

selects the active HF system

52
Q

what is the HF system connected to and partly controlled by?

A

intercom system

53
Q

how long does the HF system take to warm up?

A

2 minutes

54
Q

what are the 2 methods of frequency selection on the HF system?

A

direct tuning and channelised operation

55
Q

what does the FREQ/CHAN button on the HF system do?

A

selects either direct tuning or preset channel operation

in= CHAN (then select desired preset channel)

out= FREQ (becomes operational on the frequency last transmitted on)

56
Q

what should be done to protect the HF solid state circuitry?

A

system should only be activated after engine start up and the VOL control knob on the ICS unit set to a middle position

57
Q

how do we set SQUELCH on the HF system?

A

rotating the SQUELCH knob clockwise until background noise is heard and then counterclockwise until barely edible or absent

58
Q

what does the CLARIFIER knob on the HF system do?

A

assists in single sideband SSB reception when the ground station is slightly off frequency resulting in unnatural voice quality

59
Q

how do we operate the CLARIFIER knob on the HF system?

A

when receiving an unclear transmission, pull out the knob and rotate it either way to give natural voice quality

60
Q

what is the MODE button on the HF system used for?

A

USB,LSB and AM and is set by momentarily pressing the button until the desired mode is annunciated

61
Q

how do we tune the HF antenna once we have selected the desired receiving frequency or channel?

A

press the MIC button

62
Q

how long will tuning of the hf antenna take?

A

about 3 seconds

63
Q

how do we know tuning of the HF antenna Is complete?

A

the TX stops flashing and the frequency digits reappear

64
Q

how do we select desired transmission mode when the FREQ/CHAN button is out on the HF system?

A

push MODE until the desired transmission mode is displayed in the lower part of the display window

65
Q

what is the PGM button on the HF system used for?

A

used to change the frequency and emission mode of a preset channel

66
Q

what must be the same for transmitting and receiving on HF?

A

operating mode

67
Q

what are the 2 ways to set up an HF channel?

A

recieve only and simplex

68
Q

what will indicate a fault on the HF system?

A

flashing digits- this warning can be cleared by pressing the mic button

69
Q

what is the range of VOR/LOC frequencies that the NAV receiver can use?

A

108-117.95mhz with 50khz spacing

70
Q

what frequency range does the automatically tuned glideslope reciever use?

A

329.15-335mhz with 150khz spacing

71
Q

how many VHF NAV systems are provided?

A

2

72
Q

what powers the NAV system?

A

28v DC

73
Q

what protects the NAV system?

A

NAV 1/ESS BUS on the overhead breaker panel

NAV 2/BUS 2 on the AC/DC breaker panel

74
Q

how do we silence the morse code on the NAV receiver?

A

push the knob in (voice info will still be heard)

DO228 type rating (22 decks)

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