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Ground School Systems 3 > PC-21 Navigation System > Flashcards

PC-21 Navigation System Flashcards

1
Q

What are the three types of navigation systems in the aircraft?

A

1) Radio Navigation System (RNS)
2) GPS Landing System Sensor Unit (GLSSU)
3) Inertial Reference System (IRS)

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2
Q

What are the navigation related cockpit controls?

A
  • Heads Up Display (HUD)
  • Up Front Control Panel (UFCP)
  • Primary Flight Display
  • SFD
  • MFDs
  • FMS
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3
Q

What requirements does the navigation system satisfy?

A
  • Military navigation requirements
  • Civil route flying navigation requirements
  • Precision and non precision approach guidance
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4
Q

What does the radio navigation system provide the aircrew?

A

An awareness of the aircraft position to ground and air based beacons.

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5
Q

What are the components of the radio navigation system?

A
  • Dual VHF VOR and ILS
  • Four channel TACAN/DME transceiver
  • TACAN/DME antennas, located in lower and upper part of the fuselage
  • VOR/ILS antennas are located near the leading edge of the tail fin
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6
Q

What are VOR1 and ILS1 referred to as?

A

NAV 1

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7
Q

What are VOR 2 and ILS 2 referred to as?

A

NAV 2

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8
Q

How is NAV 1 powered?

A

From BATT BUS

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9
Q

How is the TACAN unit powered?

A

From BATT BUS

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10
Q

How is the NAV 2 receiver powered?

A

GEN 1 BUS

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11
Q

Where is the selected navigation source displayed? What are the 3 possible aids ?

A

PFD

  • ILS
  • VOR
  • TCN
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12
Q

What is the primary control of the VOR/ILS frequencies and volume settings?

A

The mission computer through the UFCP

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13
Q

What is the secondary control of the VOR/ILS frequencies and volume?

A

Through the FMS

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14
Q

What switch displays the UFCP ILS page ?

A

ILS MMS key on the UFCP

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15
Q

What does radio function key on FMS display?

A

Displays NAV1 and NAV2 frequencies on the FMS and allows them to be changed.

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16
Q

What do the cyan frequencies on the FMS mean?

A

Selected frequencies are in cyan

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17
Q

What do green frequencies on the FMS mean?

A

Standby frequencies

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18
Q

What does FMS NAV page allow for?

A

Control of the active frequencies

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19
Q

What parameters does the DME function provide?

A
  • Range
  • Time to go
  • Ident audio signal
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20
Q

What does the TACAN A-G mode provide?

A
  • Bearing
  • Range
  • Time to to
  • Ident signal
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21
Q

What does the TACAN A-A mode provide?

A

Only provides the range to the nearest A-A TACAN

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22
Q

To have range information for A-A, what must the other aircraft select?

A

A frequency code which is 63 channels apart on the same channel band.
- For example, if aircraft A IS 29X , aircraft B would be 92 X

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23
Q

What does the TACAN RCV mode provide?

A

Only bearing information to the ground station.

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24
Q

What does the UFCP TACAN scratchpad display?

A

The active channel, the TACAN ident and the selected mode , Standby Chanel on the right

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25
Q

What type of gyro is in the IRS?

A

Laser ring gyro

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26
Q

What is the main component of the IRS?

A

Inertial Reference Unit (IRU)

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27
Q

What is the IRS the primary sensor and supplier of?

A
  • Attitude (Pitch and Roll)
  • Direction
  • Accelerations
  • Velocities
  • Present Position (PP)
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28
Q

What is raw inertial position dat blended with to provide hybrid long term navigation accuracy?

A

GPS

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29
Q

What is the accuracy of the IRS as a stand alone system?

A

2.0 NM/h for sorties up to 10 hours

30
Q

When does the IRU alignment begin ?

A
  • Automatically at power up

- When it receives an IRS reset command.

31
Q

How long does the IRU alignment take when the aircraft is stationary?

A

Between 5 and 17 mins

32
Q

What will the IRU do if it sense motion and is doing its alignment?

A

It will half the alignment until the aircraft once again rests.

33
Q

How is the IRU powered?

A

From the GEN 1 BUS and the BATT BUS

34
Q

What occurs if the GEN 1 BUS voltage drops below 18 V DC?

A

The IRU automatically switches to the BATT BUS

- If GEN 1 BUS goes back to 19VDC it will switch back to GEN 1 BUS

35
Q

What does the IRS receive inputs from?

A
  • Air Data Computer (ADC)
  • Mission Computer
  • GLSSU
  • Flight Management System (FMS)
36
Q

Which systems does the IRS output data to?

A
  • PFD
  • FMS
  • MC
  • FCMC
  • GLSSU
  • TPDR
  • HSG
  • HUMS
  • FGC
37
Q

What are the IRS displays and controls?

A
  • UFCP
  • FMS
  • MFD
38
Q

What IRS data is displayed on the PFD?

A
  • ATTITUDE
  • Slip
  • Rate of turn
  • Heading
  • Wind
  • Groundspeed
  • G load
39
Q

How many GLSSUs does the PC-21 have?

A

Two

40
Q

How is GLSSU 1 powered?

A

From the BATT BUS

41
Q

How is GLSSU 2 powered?

A

From the GEN 1 BUS

42
Q

What is the default scale for Compass rose radius on MFD NAV page? What can is go up and down to?

A

20 NM

- Can go down to 0.5 NM and up to 160 NM

43
Q

What does the CTR key control?

A

Controls 3 modes:

1) Centred mode
2) Decentered mode
3) North Up mode

44
Q

What does the ALL soft key give access to?

A

The POI filter list

45
Q

How can the pilot select between the PFD HSI modes? What are the three different compass modes?

A
  • Pilot can use the PFD HSI FFK
  • Three modes are :
    1) Basic Compass Mode
    2) CDI Mode
    3) Map mode
46
Q

What is the PFD HSI basic compass mode characterised by?

A
  • No primary NAV source data is available
  • only the bearing pointers may be displayed
  • NAV FFK and CRS rotary switch are inoperative
47
Q

What info is is displayed in CDI mode?

A
  • A course pointer and deviation dots are permanently displayed in the middle of the compass rose
  • This is in relation to the primary NAV source.
48
Q

When will CDI Information not be shown when PFD is in HSI mode?

A

When primary Nav source is VOR or TACAN and the heading mode is set to true

49
Q

What occurs with CRS rotary switch when the selected NAV source is FMS or MC?

A

The CRS rotary switch is not operative.

50
Q

Where is ILS glideslope deviation scale displayed for ILS?

A

Vertically on the right side of the compass rose.

51
Q

What information does PFD HSI map mode provide?

A
  • Waypoints and Nav beacons
  • FMS and MC routes are displayed when valid
  • Laterla déviation scale is displayed permanently at the bottom of the compass rose
52
Q

Is ILS glideslope displayed on HSI map mode when primary Nav source is the ILS?

A

Yes.

53
Q

How many bearing pointers are incorporated into the compass rose?

A

BP1 and BP2

54
Q

What colour is BP1?

A

Green single arrow and inwards pointing arrow

55
Q

What colour is BP2?

A

A white double arrow with inwards pointing double arrow.

56
Q

What colour are VOR, TCN or FMS/MC?

A

VOR = Green
TCN = white
FMS and MC = Cyan

57
Q

Are bearing pointers displayed for ILS 1 or ILS 2?

A

No

58
Q

How can display format for navigation display be displayed on PFD?

A

By pressing ARC function key

59
Q

What does the HDG rotary switch do?

A

Moves the heading bug around the current rose

60
Q

What NAV info is displayed on the SFD?

A

VOR

ILS

61
Q

What modes are HUD navigation symbology displayed?

A

Nav en route

Nav approach

62
Q

When does the HUD show navigation en route symbology ?

A

With VOR1/2, TCN or FMS.

63
Q

When is HUD navigation approach symbology shown?

A

When ILS1 or ILS2 are shown as the NAV source selected on the PFD

64
Q

What does one dot on the PFD glideslope Vertical deviation scale represent?

A

0.35 degrees deviation off the glideslope

65
Q

What does one dot on the lateral deviation scale mean?

A

1.25 degrees off the inbound track

66
Q

When is back course mode entered?

A

When ILS is selected as the primary NAV mode and actual Heading is 100 degrees from the ILS inbound course

67
Q

What must the primary navigation source be set to on the PFD to conduct an RNaV approach?

A

FMS

68
Q

How can the audio monitoring of the NAV aid identification be done?

A

By pressing ILS key on UFCP and then the N1 or N2 key

69
Q

In the event of an MC failure what can be used as backup?

A

FMS

70
Q

What will occur to MFD and HUD if MC fails?

A

Only flight and normal navigation symbology will be available on the HUD and the MFD displays will be blank with a Red Cross in them
- NAV Data will still be displayed on the PFD and SFD

Ground School Systems 3 (17 decks)

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