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A321 > Surveillance > Flashcards

Surveillance Flashcards

1
Q

how many surveillance system does A/C have ?

A
  • Transponder
  • Wx radar
  • GPWS
  • TCAS
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2
Q

How many XPDR does A321 have ?

A

2

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3
Q

What is the function of ADS-B OUT ?

A

With ADS-B OUT capability, the Mode S XPDR auto and continously transmit surveillance data, without preliminary interrogation, to:
* ATC ground station
* A/C capable of ADS-B IN function

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4
Q

XPDR MODE SELECTOR
* STBY
* ON
* AUTO

A

STBY: both XPDR ellectrically supplied but do not operate
ON: selected XPDR operates
AUTO:
* inflight selected XPDR operates
* on ground XPDR operates only in Mode S (selective a/c interrogation mode)

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5
Q

How many mode can the flight crew use with Wx radar ?

A

2 mode
* Multiscan automatic mode
* Manual mode

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6
Q

How can fly crew use Multiscan automatic mode ?

A

MULTISCAN sw set to AUTO

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7
Q

How can fly crew use manual mode ?

A

MULTISCAN sw set to MAN

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8
Q

What are the benefits when using Wx radar in Multiscan automatic mode ?

A
  • The radar alternatively scans at two antenna tilt settings
  • Gain seletor can operate in CAL position
  • Remove wx not on flight path or not a threat to a/c
  • GCS function operate
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9
Q

Gain selector:
* CAL

Calibrated

A

CAL: radar auto adjusts the gain based on various parameters (alt, geographical area, season, time of day) to obtain the best wx displayed

Calibrated

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10
Q

What is GCS function ?

Ground clutter suppression

A

Remove the ground return from ND

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11
Q

What is the operational upper limit of PWS ?

Predictive Windshear System

A

2300 ft

RA

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12
Q

Can the PWS operate with wx radar OFF ?

A

Yes if PWS is in auto

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13
Q

What is the range of PWS ?

A

5NM

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14
Q

What is the range of PWS during T/O roll up to 100kt ?

A

3NM

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15
Q

When does windshear alert is inhibited ?

A

For T/O from 100kt until 50ft
For landing below 50ft

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16
Q

What is the colour that present for turbulence ?

Wx radar

A

Magenta

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17
Q

How far can Wx radar scan for turbulence ?

A

40NM

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18
Q

What is the colour code when in MAP mode ?
* Black
* Green
* Amber

Wx radar

A
  • Black: water
  • Green: ground
  • Amber: cities and mountains
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19
Q

Which mode of ND will display wx infor ?

A

Any mode accept PLAN

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20
Q

How do you know Multiscan automatic mode is active ?

Wx radar

A

2nd row on ND displayed in green

Wx indication area

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21
Q

How do you know MAN mode is active ?

Wx radar

A

2nd row on ND displayed in blue

Wx indication area

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22
Q

What ‘NO AUTO TILT’ mess in amber mean ?

A

Multiscan function is lost

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23
Q

How to make ‘NO AUTO TILT’ mess in amber disapear ?

A

MULTISCAN sw to MAN

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24
Q

What are the indication when Multiscan function is lost ?

A
  • Tilt value is dashed
  • “NO AUTO TILT” in amber mess appear
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25
Q

What is the meaning of a yellow arc on the outermost scale of ND ?

Wx radar

A

PAC alert of a storm cell

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26
Q

When is PAC alert avail ?

A
  • gain in CAL position
  • a/c within 80nm of storm cell

regardless of the position of MULTISCAN sw

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27
Q

What is Wx hazard prediction function ?

Wx radar

A

Consists of 3 function
* Core Threat Assessment and Associated Threat Assessment
* Predictive Overflight

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28
Q

When does hazard prediction function avail ?

Wx radar

A

Multiscan mode in AUTO

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29
Q

Wx radar

What is Predictive Overflight ?

Hazard Prediction Function

A

Alert flight crew of storm cells that may rapidly build below a/c flight path

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30
Q

Wx radar

What is Core Threat Assesment and Associated Threat Assesment ?

Hazard prediction function

A

Wx radar computes an threat assessment of lightning, hail and convective activity in a storm cell and in the area near the storm cell

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31
Q

Wx radar

What is the range of Core Threat Assessment ?

Hazard Prediction Function

A

320NM

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32
Q

Wx radar

What is the indication of Associated Threat Assessment ?

Hazard Prediction Function

A

Red dot within or outside of cell boundary

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33
Q

Hazard predictive function (Wx radar)

When is the information avail ?

Associated Threat Assessment

A
  • For red dot within cell boundary: a/c below freezing level or up to 6000ft abv freezing level
  • For red dot outside cel boundary: all alt
34
Q

Wx radar

When is Predictive Overflight function avail ?

Hazard Predictive Function

A

Abv 25000ft and up to 40NM

35
Q

Wx radar

What is the indication of Predictive Overflight function ?

Hazard Predictive Function

A

Red dot with red boundaries

36
Q

GPWS

How many basic mode does GPWS have ?

A

Five mode:
Mode 1. Excessive rate of descent
Mode 2. Excessive terrain closure rate
Mode 3. Altitude loss after takeoff or GA
Mode 4. Terraine clearance not sufficient, if not in landing cofiguration
Mode 5. Excessive descent below glide slope

37
Q

What is the operational limit of five basic mode of GPWS ?

A

Up to 2500ft RA

38
Q

What is the function of predictive GPWS ?

A
  • Forward Looking Terrain Alerting function
  • Provide Obstacle database
39
Q

How does predictive GPWS work ?

A

Base on GPWS database to displayed terrain infor

40
Q

What input does GPWS use to compute geometric alt of A/C ?

A
  • Pressure alt
  • RA
  • Temp
  • Barometric ref
  • GPS alt for predictive GPWS
  • Data from GPWS database for predictive GPWS
41
Q

GPWS

What are the input of Mode 1 ?

A
  • RA
  • Rate of descent
42
Q

GPWS

What is the caution aural alert of Mode 1 ?

A

Sink rate, Sink rate

43
Q

What is the warning aural alert of Mode 1 ?

A

Pull up

44
Q

GPWS

What are the input of Mode 2 ?

A
  • Landing gear/flaps config
  • RA
  • RA rate of change
45
Q

GPWS

How many mode 2 are there ?

A

Mode 2A
Mode 2B

46
Q

What is the difference btw Mode 2A and 2B ?

A

Mode 2A active during climb, cruise, initial approach
Mode 2B active during approach and 60s after T/O

47
Q

GPWS

What is the caution aural alert of Mode 2 ?

A

Terrain, Terrain

48
Q

GPWS

What is the warning aural alert of Mode 2 ?

A

Pull up

49
Q

GPWS

How does mode 3 triggered ?

A

When alt significantly decrease after T/O, and GA with landing gear of flaps not in landing config

50
Q

What is the caution aural alert of Mode 3 ?

A

Don’t sink, Don’t sink

51
Q

GPWS

How many Mode 4 are there ?

A
  • Mode 4A
  • Mode 4B
  • Mode 4C
52
Q

GPWS

When does mode 4A and 4B active ?

A

during cruise and approach

53
Q

GPWS

When does Mode 4C active ?

A

During approach

54
Q

GPWS

How does mode 4A and 4B trigger ?

A

Base on phase of flight, landing gear and flap config and speed

55
Q

GPWS

How does mode 4C trigger ?

A

Base on minimum terrain clearance and RA

56
Q

GPWS

What is caution alert of mode 4A ?

A
  • Too low terrain
  • Too low gear
57
Q

GPWS

What is caution alert of mode 4B ?

A
  • Too low terrain
  • Too low flap
58
Q

GPWS

What is caution alert of Mode 4C ?

A

Too low terrain

59
Q

GPWS

How does Mode 5 trigger ?

A

When A/C descend below G/S

60
Q

GPWS

What is caution alert of mode 5 ?

A

Glideslope

61
Q

GPWS

What is the function of TAD ?

Terrain Awareness and Display

A

Computes a caution and warning envelope in front of A/C. When these boundary conflict with terrain or with an obstacle memorized in database, system generate alert

Enhance GPWS mode

62
Q

GPWS

Will terrain appear on ND when TAD generate alert without TERR ON ND pb selected ON ?

A

Yes

63
Q

GPWS

Without TERR ON ND selected, will terrain be displayed on ND ?

A

Yes, if TAD generate alert

64
Q

GPWS

How does TAD and TCF compute A/C position ?

Enhance GPWS mode

A

They operate purely on lateral GPS position

65
Q

GPWS

What is the difference btw NEO and CEO A/C relating to TAD and TCF function ?

A

If nav accuracy is low
On NEO the enhanced GPWS mode is off automatically
On CEO crew need to manually set it off

66
Q

GPWS

Are warning and caution distance of GPWS constant ?

A

No, it varry with ground speed and turn rate

67
Q

GPWS

What is TCF ?

Terrain Clearance Floor

A

An enhance GPWS Mode 4

68
Q

GPWS

What is TCF function ?

A

Compute a terrain clearance envelope around airport RWY.
It will trigger alert when terrain clearance is not sufficent

69
Q

GPWS

How does TCF trigger alert ?

A

When A/C descend below protection envelope

70
Q

GPWS

What is TCF caution alert ?

A

Too low terrain

71
Q

GPWS

What is RFCF function ?

Runway Field Clearance Floor

A

Provide an addition protection for rwy that are at elevation that is significantly more than surrounding area

72
Q

GPWS

How does RFCF work ?

Runway Field Clearence Floor

A

Compute an envelop winthin a specific distance from rwy. This envelope base on geometric alt and rwy elevation. If A/C descend below this envelope, alert will be trigger.

73
Q

GPWS

What is caution alert of RFCF ?

Runway Field Clearance Floor

A

Too low terrain

74
Q

GPWS

How to turn off Predictive GPWS mode ?

Enhance GPWS mode

A

TERR pb OFF

On GPWS pannel

75
Q

GPWS mode

How to turn all basic GPWS mode off ?

A

SYS pb off

On GPWS pannel

76
Q

GPWS

Fault light on SYS pb ?

A

Basic Mode 1-5 lost
“NAV GPWS FAULT” alert trigger on ECAM

77
Q

GPWS

What happen if ILS 1 fails inflight ?

A

Mode 5 lost
But “NAV GPWS FAULT” alert not trigger
GPWS fault light not on

78
Q

GPWS

G/S MODE pb OFF ?

A

Mode 5 inhibited

79
Q

GPWS

FLAP MODE pb OFF ?

A

Mode 4 inhibited

80
Q

GPWS

LDG FLAP 3 pb ON

A

Mode 4 inhibited in config 3
LDG MEMO display FLAPS…3 instead of FLAPS…FULL

81
Q

GPWS

What is the difference of PULL UP-GPWS pb on NEO and CEO A/C ?

A

On NEO this pb can only cancel alert of mode 5
On CEO can cancel all mode

82
Q
A

A321 (25 decks)

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