GPWS Flashcards

1
Q

How many modes does GPWS have?

A

7

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2
Q

Which alert have priority nr 1, 2 and 3with GPWS warnings?

A

Priority 1 = Mode 7 “Windshear x3”
Priority 2 = Mode 1 “Pull up” (sink rate)
Priority 3 = Mode 2 “Pull up” (terrin closure)

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3
Q

Describe GPWS Mode 1

A

Mode 1 = EXCESSIVE DESCENT RATES
Activates below 2’500 ft AGL
Has two protection envelopes:
1. “SINK RATE x 2”
2. “PULL-UP”

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4
Q

Describe GPWS Mode 2

A

Mode 2 = EXCESSIVE TERRAIN CLOSURE
Activates when terrain is within 2’000 ft of the aircraft
Has two protection envelopes:
1. “TERRAIN TERRAIN”
2. “PULL -UP”

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5
Q

Describe GPWS Mode 3

A

Mode 3 = ALTITUDE LOSS AFTER TAKE-OFF
Works from 50 ft altitude
Activates when altitude loss is 10% of altitude gained.
(A 50 ft altitude loss after 500 ft altitude gain)
Warning is : “DON’T SINK x 2”

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6
Q

Describe GPWS Mode 4

A

Mode 4 = INSUFFICIENT TERRAIN CLEARENCE. Alerts below 1’000 ft with “TOO LOW TERRAIN”
Mode 4A: “TOO LOW GEAR” below 500 ft AGL and less
than 190 kts
Mode 4B: “TOO LOW FLAPS” below 245 ft AGL kts and
less than 160 kts
Mode 4C: “TOO LOW TERRAIN” Active during takeoff and alerts when the terrain is rising more steeply than the aircraft is climbing

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7
Q

Describe GPWS Mode 5

A

Mode 5 = DESCENT BELOW GLIDESLOPE
Works below 925 ft AGL and 1.3 dots Fly Up indication
Soft warning = Below 925 ft and below 1,3 dots
Hard warning = Below 300 ft and below 2,0 dots
Will reset below 50 ft, above 1’900 ft and when selecting a VOR frequency

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8
Q

Describe GPWS Mode 6

A

Mode 6 = ADVISORY CALLOUTS
“MINIMUMS”
“FIVE HUNDRED”
“50, 40, 30 RETARD”
“BANK ANGLE”

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9
Q

Which one have higher priority, GPWS or TCAS?

A

GPWS

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10
Q

What happens to the GPWS functions when you get a FAULT light on the TERR pb?

A

All basic GPWS functions are lost but Enhanced features remain

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11
Q

You get a Terrain Warning, how long until impact?

A

30 seconds

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12
Q

You get a Terrain Caution, how long until impact?

A

60 seconds

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13
Q

What is the difference between the basic and enhanced GPWS?

A

Basic simply looks at the Radio Altimeter while enhanced looks and predicts terrain ahead.

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14
Q

If the TERR function of EGPWS fails, or is selected OFF, what happens to GPWS?

A

Inhibits the TAD and TCF modes, and does not affect the basic GPWS mode 1-5. If OFF is selected the ECAM caution NAV GPWS TERR DET FAULT is displayed.

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15
Q

When should LDG FLAP 3 pb be selected ON?

A

Flap mode (too low flaps mode 4) is inhibited, to avoid nuisance warning in case of landing with flaps setting reduced).

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16
Q

How is the terrain information displayed in order to prevent confusion with weather radar?

A

To differentiate between the terrain and the weather display, the terrain display sweeps form the center outward to both sides of the ND.

17
Q

What happens to GPWS warnings if the loudspeakers are turned off?

A

The audio volume of GPWS aural warning or cautions is not controlled by the loudspeaker volume knobs.

18
Q

Does a “FAULT” light on the SYS pushbutton affect the TERRAIN mode?

A

No

19
Q

If the TERR mode failed, does it affect the basic GPWS?

A

No

20
Q

What does an amber “FAULT” light in the SYS pushbutton indicate on the GPWS panel?

A

Any failure of GPWS mode 1-5

21
Q

Pressing the SYS pushbutton on the GPWS panel does what?

A

Inhibits all EGPWS warning except TERR system

22
Q

When is the Ground Proximity Warning System (GPWS) active?

A

The GPWS is embedded in the TCAS system (Terrain and Traffic Collision Avoidance system) and generates aural and visual warnings between radio altitudes 10 and 2450ft.

23
Q

What does Magenta color mean on the Terrain display?

A

Unknown areas

24
Q

When is high density red displayed on the Terrain display?

A

Above +2000 ft of aircraft altitude

25
Q

When is high density yellow displayed on the Terrain display?

A

Above +1000 ft but below 2000 ft of aircraft altitude

26
Q

When is high density green displayed on the Terrain display?

A

Down to - 1000 ft below aircraft altitude

27
Q

When is low density green displayed on the Terrain display?

A

From -1000 ft down to -2000 ft below aircraft altitude

28
Q

MEMORY ITEM:

EGPWS

A

“PULL UP TOGA”

  • A/P - OFF
  • PITCH - FULL BACK STICK
  • THR LEVERS - TOGA
  • SPEED BRAKES - RETRACT
  • BANK - WINGS LEVEL