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ATR > Navigation > Flashcards

Navigation Flashcards

1
Q

Where are the VHF antennas

A

Top of the fuselage

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2
Q

What powers the VHF receivers?

A

VOR 1 - DC stby bus

VOR 2 - DC Bus 2

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3
Q

Where are the VOR receivers located?

A

They use the same antenna located on the vertical stabiliser

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4
Q

What powers the ILS receivers?

A

ILS 1 - DC stby bus

ILS 2 DC bus 2

They are incorporated in the same box as the VOR and so use the same power source

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5
Q

Where is the localiser antenna located?

A

It is the same antenna as the VOR, located in the vertical stabiliser

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6
Q

Where is the ILS glide slope antenna

A

Bottom of the fuselage, just aft of the radome

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7
Q

What does the HLD position mean?

A

Crew can select a different receiver frequency while holding the DME receiver to the current frequency

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8
Q

What frequencies are shown in the nab control box display window?

A

Upper portion is active frequency
Standby frequency displayed underneath

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9
Q

What is the MEM position of the transfer switch used for?

A

Used to select a stored frequency

Up to four frequencies can be stored in the memory

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10
Q

What does the amber ACT mean on the nav control box

A

The actual receiver freq of the VOR or ILS receiver is different from the selected active frequency

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11
Q

What does the amber MEM mean on the nav control box?

A

A frequency that is stored in memory is displayed in the lower portion

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12
Q

What does the amber RMT light mean on the nav box?

A

The navigation radio is controlled by a different system such as the FMS

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13
Q

What does the amber HLD light on the nav box mean

A

A DME freq is being held

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14
Q

Where are the marker beacon receivers located?

A

The two receivers share the same antenna, located on the bottom of the fuselage, just forward of the main landing gear bay

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15
Q

Which marker beacon supplies audio signals?

A

Only marker beacon 1 audio signals are supplied to the RCAU and FDAU

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16
Q

What controls the DME receiver?

A

The NAV 1 control box

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17
Q

What powers the DME receivers?

A

DME receiver 1 - DC bus 1

DME receiver 2 - DC bus 2

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18
Q

Where are the DME receivers located?

A

Each has its own antenna, located under the forward part of the fuselage

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19
Q

How is a held DME frequency indicated?

A

An amber H shows on the upper right hand side of the EHSI

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20
Q

Where is the ADF antenna located?

A

On top of the fuselage

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21
Q

What powers the ADF receivers?

A

ADF receiver 1 - DC stby bus

ADF receiver 2 - DC bus 2

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22
Q

Where are the radio altimeter antennas located?

A

Bottom part of the fuselage, forward of the landing gear bays

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23
Q

What powers the radio altimeter?

A

DC bus 1

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24
Q

What range can the radio altimeter display?

A

-20 feet to 2500 feet

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25
Q

What does it mean if the RA displays amber dashes?

A

The radio altimeter data is invalid

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26
Q

What are the GPWS modes?

A

1 - Excessive sink rate
2 - Excessive Terrain Closure Rate
3 - Altitude loss after take off
4 - Unsafe terrain clearance in the landing configuration
5 - Glideslope
6 - Altitude call-outs

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27
Q

What height will you get mode 1 and 2 alerts and warnings?

A

Only when aircraft is less than 2450 feet above local terrain

28
Q

When are GPWS inactive?

A

All modes are inactive below 50 ft AGL and above 2450 ft AGL

29
Q

How can you stop unwanted GPWS alerts

A

Can inhibit the Terrain Awareness Alerting and Display Function by selecting TERRAIN inhibit switch within 15nm of take off, approach or landing at:
- an airport not contained in the EGPWS airport database
- airport has no approved instrument approach procedure
- longest runway is less than 3510 ft

30
Q

How can you select terrain display?

A

Use the DSP SEL pb

31
Q

When will terrain not be shown?

A

If it is more than 2000 ft below the reference altitude or if terrain elevation is within 400 ft of the runway elevation nearest to the aircraft

32
Q

How do you test the GPWS system?

A

By pressing the GPWS-GS pb before the first flight of the day

33
Q

What will be shown if the Terrain Inhibit Switch has been used?

A

TERR INOP will be displayed on the weather radar display

34
Q

When will the mode 2 “terrain” callout stop?

A

When the aircraft has climbed 300 ft or when the radio altitude exceeds the detection range of the radio altimeter

35
Q

When is mode 3 active?

A

Between 75 and 1500 ft after take off

It is disabled when the aircraft has gained sufficient altitude and is no longer in the take off or go around mode

36
Q

When is mode 4A armed?

A

Provides alerts to prevent a gear up landing

Active once aircraft reaches 700 ft AGL after take off and below 1000 ft on approach

37
Q

When will you get “too low gear” warning

A

When the aircraft descends below 500 ft and the gear is retracted

38
Q

When is Mode 4B activated?

A

Aircraft is on approach with landing gear extended and flaps not in landing configuration

Boundary is 1000 ft (decreases to 245 ft RA when speed is less than 259 kt)

39
Q

What is the mode 4 sub mode priority?

A

Too low gear takes precedence over too low flaps

40
Q

What will you get a “too low terrain” warning

A

When the terrain is rising faster than the aircraft is climbing

Mode 4C active after take off or go around above 245 ft when landing gear and flaps are not in landing configuration

41
Q

When will you get Mode 5 (glide slope) alerts

A

When aircraft has penetrated glideslope alert envelope and is below 1000 feet RA

Soft aural alert if aircraft is more than 1.3 dots below the glideslope

Hard alert when aircraft is below 300 ft RA and more than two dots below the glideslope

Repetition rate of audio and flashing light will increase as the radio altitude decrease and the deviation increases

42
Q

How can mode 5 be inhibited

A

When aircraft is less then 2000 ft by pressing either glideslope switch light

43
Q

What call out will you get when the aircraft descends below the decision height

A

“Minimums minimums”

44
Q

What call out will you get when the aircraft descends below the decision height

A

“Minimums minimums”

45
Q

What is the weather radar coverage?

A

Up to 300 nm and will cover an arc of 45 degrees on each side of the aircraft

46
Q

What is ground mapping mode?

A

Ground returns are also displayed on the EHSIs

Mode selected to GMAP position

47
Q

How is the weather radar powered?

A

By DC Bus 1 and the 26 VAC stby bus

48
Q

How do you know the weather radar is inoperative?

A

The mode selector is in the OFF position and the WX message displayed in amber on the EHSIs

49
Q

What is the weather radar standby mode?

A

The SBY position powers up the system - the antenna is not rotating and the weather radar transmitter is inhibited

STBY is displayed in green on the EHSIs

Radar will automatically return to standby mode after aircraft lands even if the selector is in the WX position

50
Q

When is the weather radar operating?

A

When the mode selector is in the WX position

Returns are displayed on the EHSIs when they are in ARC mode

51
Q

When is the weather radar operating?

A

When the mode selector is in the WX position

Returns are displayed on the EHSIs when they are in ARC mode

52
Q

What is flight plan mode?

A

Mode selector in FP position

Radar returns are removed from EHSI and EHSI is placed in flight plan mode

Target alerts can be displayed - green TGT message on EHSIs

53
Q

What is the range for target mode

A

Arc of plus or minus 7.5 degrees on each side of the aircraft

When radar detects a precipitation level 3 or greater, TGT message turns amber

54
Q

What will displayed in the test mode of weather radar?

A

Test pattern will be displayed on EHSIs and green TEST

55
Q

How is the radar antenna adjusted

A

Tilt can be adjusted 15 degrees up or down by the TILT control knob

56
Q

What is the radar range?

A

Between 5 and 300 nm

In flight plan mode, range can be between 500 and 1000 nm

57
Q

What will show when the gain is being manually set?

A

Amber VAR message

58
Q

What is the react function?

A

Compensates the radar returns for attenuation due to radar signal travelling through precipitation - shows a more accurate picture of what’s happening behind a red zone

Press RCT button to activate and RCT will show in green

59
Q

When will WAIT show on the EHSI?

A

When the radar is still in the warm up mode

After that WX RCT will appear in green

60
Q

What will show when RCT mode and ground clutter reduction feature are used at the same time!?

A

CR/R in green on the EHSI

61
Q

How is the radar antenna stabilised?

A

By the AHRS system

Can be turned on or off by the STAB pb

62
Q

What is the scan sweep on the radar antenna?

A

Arc of 120 degrees (EHSI can only displayed 45 degrees)

Scan speed can be increased by pressing SECT button - rate increases to 24 sweeps (from 12) but reduces arc to 60 degrees

63
Q

What does an amber WX mean?

A

Radar is selected on EFIS control panel but radar selected OFF on radar control box

OR radar is not scanning when the radar is selected on EFIS control panel and radar control box

64
Q

What does a magenta TX mean?

A

Radar is operating but the radar returns are dimmed

65
Q

How many characters can be entered in the scratchpad?

A

24

66
Q

How many characters can be entered in the scratchpad?

A

24

ATR (25 decks)

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