Warning Systems

Question 1

What does dotted green terrain display on the navigation display indicate? Amber? Red?
Magenta?

Answer 1

RED - More than 2,000ft above

YELLOW - Terrain 500ft (250 w/ gear) to 2,000ft above

GREEN - Terrain from 500ft (250 w/ gear) to 2,000ft below
MAGENTA - No terrain data available

Question 2

Is Doppler turbulence detection capable of detecting clear air turbulence?

Answer 2

NO! It requires at least light precip (a radar return)

Question 3

What triggers an aural “CAUTION TERRAIN” alert with an amber TERRAIN message?

Answer 3

“CAUTION TERRAIN” + TERRAIN: 40 - 60 seconds from projected impact

“TERRAIN, TERRAIN, PULL UP” + TERRAIN: 20 - 30 seconds from projected impact

Question 4

For takeoff, when does the PWS activate if the WXR switch is not selected ON during taxi?

Answer 4

Thrust lever angle advanced above 53 degrees and 12 seconds after (takes that
long to initialize)

Question 5

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

Answer 5

No, the flight crew must rely on traditional methods at times. (No moisture, no
way to know)

Radar is only predictive windshear

Question 6

The predictive windshear (PWS) alert area extends how far?

Answer 6

3 NM ahead

30 degrees either side of course

Question 7

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

Answer 7

After 12 seconds

Question 8

When will the TCAS system issue the aural advisory “CLEAR OF CONFLICT”? “MONITOR
VERTICAL SPEED”?

Answer 8

CLEAR OF CONFLICT - RA is clear

MONITOR VERTICAL SPEED - Pitch attitude is away from the commanded RA.
Keep away from the red area. “Bucket of doom”

Question 9

What triggers a “WINDSHEAR AHEAD” aural alert?

Answer 9

Predictive windshear - function of radar

• Active on takeoff and approach
• Activated by turning WXR ON or advancing TLs above 53 degrees TLA
• 12 second delay before active
• Cautions inhibited over 80kts/below 400ft (not on test)
• Warnings inhibited over 100kts/below 50ft (not on test)
• Requires visible moisture or particulate to work
• Works out to 3nm and 30 degrees of course on either side

**“WINDSHEAR AHEAD, WINDSHEAR AHEAD”
Caution: visual WINDSHEAR on ND outside your flightpath
Warning: visual WINDSHEAR on ND on your flightpath

Question 10

What are TCAS traffic advisory TA symbols? Resolution Advisory RA symbols?

Answer 10

TA = amber dot
RA = red box

Question 11

When are TCAS RAs inhibited?

Answer 11

below 1000ft, goes to TA ONLY

Question 12

How does the RUNWAY AWARENESS and ADVISORY SYSTEM (RAAS) operate?

Answer 12

TURNS ON AUTOMATICALLY

Question 13

When could you receive an aural and visual WINDSHEAR alert on approach? Takeoff? What
indicates that the TCAS computer is not computing RAs, but only TAs?

Answer 13

• WS Approach - from an altitude of 1500ft AGL to 10ft AGL.
• WS Takeoff - from rotation until reaching an altitude of 1500ft AGL.
• WS Missed Approach - until an altitude of 1500ft AGL
• TCAS indication is displaying “TA ONLY” in cyan color

Reactive

Question 14

When do GPWS windshear alerts occur? Where is the alert displayed?

Answer 14

Takeoff, approach, and missed approach - displayed on attitude indicators

Question 15

When are RA calls provided on an approach?

Answer 15

“FIVE HUNDRED” - 500ft is ONLY RA callout on a non-ILS approach

Question 16

When may you test the Ground Proximity System Test (SYS TEST)?

Answer 16

On the ground

Question 17

When does the GPWS provide the aural alert BANK ANGLE, BANK ANGLE?

Answer 17

At 35°, 40°, 45°

Question 18

When do GPWS windshear alerts occur? Where is the alert displayed?

Answer 18

Takeoff, approach, and landing, <1,500’ AGL. Both PFDs.

Question 19

Pushing the TERR Display select switch shows what (in expanded MAP)? What does it
remove?

Answer 19

Shows terrain data and removes weather radar display.

Question 20

What does dotted Green terrain display on the Navigation Display indicate?

Answer 20

Terrain 2000’ below to 500’ (250’ with gear down) below the aircraft’s current altitude.

Question 21

What does an amber elevation under TERR on the Navigation Display indicate?

Answer 21

Terrain elevation which is between 500’ below and 2000’ above the aircraft altitude.

Question 22

Regardless of selected range, selecting WX+T shows weather radar returns and includes turbulence within what range?

Answer 22

40nm for all selected ranges

Question 23

CAUTION AND WARNING OBSTACLE AND TERRAIN CALLOUTS

Answer 23

40 to 60 seconds from projected impact:
CAUTION OBSTACLE or CAUTION TERRAIN

20 to 30 seconds from projected impact:
OBSTACLE…OBSTACLE PULL UP
TERRAIN…TERRAIN PULL UP

In IMC, we will always perform escape maneuver at first indication

Question 24

Windshear - function of GPWS

Answer 24

REACTIVE in actual windshear

• Active from rotation through 1500 RA
• “WINDSHEAR, WINDSHEAR” aural alert
• visual WINDSHEAR on PFD

Question 25

Predictive windshear

Answer 25

Predictive windshear - function of radar

• Active on takeoff and approach
• Activated by turning WXR ON or advancing TLs above 53 degrees TLA
• 12 second delay before active
• Cautions inhibited over 80kts/below 400ft (not on test)
• Warnings inhibited over 100kts/below 50ft (not on test)
• Requires visible moisture or particulate to work
• Works out to 3nm and 30 degrees of course on either side
• “WINDSHEAR AHEAD, WINDSHEAR AHEAD”
• Caution: visual WINDSHEAR on ND outside your flightpath
• Warning: visual WINDSHEAR on ND on your flightpath

Question 26

RADAR CANNOT.. (2)

Answer 26

Radar CANNOT detect clear air turbulence (needs a radar return)
Radar CANNOT detect windshear without moisture (needs a radar return)