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Flashcards in Exam Review: GPWS Deck (16)
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1
Q

What is GPWS?

A

Ground Proximity Warning System

2
Q

What is the purpose of GPWS?

A

Prevent CFIT by proving AURAL/VISUAL warning

3
Q

What are the 8 INPUTS of GPWS?

A
  1. GS Deviation
  2. Barometric Alt rate
  3. IAS
  4. Rad Alt
  5. DH Trip Point
  6. Flap position
  7. Gear up/down
  8. Self test
4
Q

What is mode 1?

A

Excessive Descent Rate (baro sink)

5
Q

If the initial warning is “SINK RATE” what mode is it?

A

1 (EDR)

6
Q

This mode is divided into 2 and tells us when CLOSURE rate is too high

A

2

7
Q

What is mode 2a and 2b?

A

2a: Flaps<25
2b: Flaps>25

8
Q

What does mode 2a tell us?

A

Compares Rad alt with Rad alt closure rate

TERRAIN TERRAIN

9
Q

How is mode 2b deactivated?

A

200’-600’ depends on BARO sink rate

10
Q

What is Mode 3?

A

Descent After Take Off (DATO)

11
Q

This mode warns of excessive BAROMETRIC Alt loss after take off/go around, aurally says “DONT SINK”

A

Mode 3

12
Q

This mode operates during LANDING and advises of insufficient terrain clearance when A/C

A

Mode 4

13
Q

What are the 2 modes of 4?

A

4a: Retracted
- <190 TOO LOW GEAR
- >190 TOO LOW TERRAIN

4b: EXTENDED
- <154 TOO LOW FLAPS
- >154 TOO LOW TERRAIN

14
Q

What does Mode 5 tell us?

A

Below Glideslope (1000’)

15
Q

This mode warns us of excessive BANK ANGLE

A

Mode 6

Provides Rad Al readout

16
Q

What does mode 7 do?

A

Windshear Protection

warns of microburst