737 Systems: Warning Systems

Question 1

Which switch is used to inhibit the “TOO LOW FLAPS” GPWS alert?

Answer 1

FLAP INHIBIT switch on the Ground Prox panel

Question 2

When are Radio Altimeter callouts provided on an approach?

Answer 2

-If on any other approach OTHER than an ILS: “500”

-Based on the CA setting:“Minimums”

-When bank exceeds 35/40/45, “BANK ANGLE”

Question 3

How is an actual windshear encounter annunciator to the flight crew by the GPWS system?

Answer 3

If below 1500ft RA and above rotation:
Aural: “WINDSHEAR”

Visual: Read WINDSHEAR on both attitude indicators

Question 4

What does the red terrain elevation on the terrain elevation display indicate?

Answer 4

Terrain is >2000ft above the aircraft

Question 5

Is Radar Turbulence detection capable of detecting CAT?

Answer 5

No it is not

Question 6

What does pushing the WX+T on the Radar Control Panel provide?

Answer 6

Weather plus Threats: Weather radar returns, and turbulence

Question 7

WX+T provides turbulence within how much range?

Answer 7

40 NM

Question 8

How is radar scanning activated?

Answer 8

The WXR switch on the EFIS control panel energizes the Weather Radar Transmitter and display information on the ND

Question 9

How is the Predictive Windshear System activated?

Answer 9

Either weigh the WXR switch on the EFIS panel or by advancing the thrust levers for TO (12 seconds for PWS alerting)

Question 10

Does the weather radar provide alerting for all types of windshear?

Answer 10

No, detects microbursts and windshear with similar characteristics

Question 11

How far does the predictive windshear area extend?

Answer 11

3 NM

Question 12

When is the predictive windshear alerting available on the ground after the radar starts scanning?

Answer 12

12 seconds after scanning commences

Question 13

What does an aural “MONITOR RADAR DISPLAY” alert indicate?

Answer 13

Windshear is along, but not in front, of the aircrafts path

Question 14

When is the Runway Awareness and Advisory System (RAAS) enabled?

Answer 14

Operates automatically as a function of the GPWS system

Question 15

What are the TCAS Traffic advisory symbols?

Answer 15

Red Square: Resolution Advisory

Amber Circle: Traffic Advisory

White diamond: Proximate traffic

Question 16

When will the TCAS system issue the aural advisory, “CLEAR OF CONFLICT”?

Answer 16

RA Encounter terminated, guidance no longer displayed

Question 17

When will the TCAS system issue the aural advisory, “MONITOR VERTICAL SPEED”?

Answer 17

Present pitch attitude is outside the RA pitch command area, keep pitch attitude away from red area

Question 18

What are the indications of a RA on the PFD?

Answer 18

Red lines appear, displaying the pitch regions to avoid in order to resolve traffic conflict.