Warning Systems

Question 1

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

Answer 1

The FLAP INHIBIT switch is guarded to the NORM position. In this position, the
TOO LOW FLAPS alert is active. Placing the switch to the FLAP INHIBIT position, inhibits
ground proximity TOO LOW FLAPS alerts from occurring.

Question 2

When are Radio Altimeter callouts provided on an approach?

Answer 2

When descending below 500 ft radio altitude on approach, a FIVE HUNDRED callout is given if:
- an approach other then ILS or GLS is used, or
- A valid localizer frequency is tuned and:
• the flight path is not within +/- 2 dots of a localizer beam, or
• the flight path is not within +/- 2 dots of a Glide Slope beam, or
• a backcourse approach is detected
DH / MDA CALLOUTS
The GPWS provides height callouts based on the altitude set by the Captain’s Minimums selector.
Callouts are based on radio altitude when the MINS selector is set to RADIO. Callouts are based on barometric altitude when the MINS selector is set to BARO. At DH/MDA,
the aural alert “MINIMUMS, MINIMUMS” is initiated.

Question 3

How is an actual windshear encounter annunciated to the Flight Crew by the GPWS system?

Answer 3

Windshear warnings are accompanied by WINDSHEAR on the attitude indicators and voice alerts. The WINDSHEAR (red) warning indication will remain displayed for as long as the aircraft is exposed to conditions in excess of the warning alert threshold.

Question 4

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

Answer 4

red - terrain elevation is more than 2000 ft above the aircraft altitude

Question 5

Is Radar Turbulence detection capable of detecting clear air turbulence?

Answer 5

Doppler turbulence detection relies on the presence of at least light precipitation to measure precipitation velocities.

Therefore, it is not capable of detecting clear air turbulence.

Question 6

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

Answer 6

Weather Plus Threats, when pushed, displays weather radar returns and threats when operating in AUTO mode.

Question 7

WX+T only provides turbulence within how much range?

Answer 7

Turbulence is displayed out to 40 nm
for all selected ranges.

Question 8

How is radar scanning activated?

Answer 8

The radar is provided power when the WXR switch is selected on the EFIS Control Panel.

Question 9

How is the Predictive Windshear System activated?

Answer 9

PWS may be activated by:
- selecting either WXR switch on the EFIS Control Panel (antenna sweeps alternate
between windshear and weather returns), or
- advancing either thrust lever (all antenna sweeps are for windshear)

Question 10

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

Answer 10

The weather radar detects microbursts and other windshears with similar characteristics. The weather radar does not provide alerting for all types of windshear. The Flight Crew must continue to rely on traditional windshear avoidance methods.

Question 11

How far does the predictive windshear area extend?

Answer 11

3 nm

Question 12

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

Answer 12

Alerting is not available until approximately 12 seconds after the weather radar begins scanning for windshear

Question 13

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

Answer 13

Windshear within 3 miles and ahead of the
aircraft detected by the weather radar.

Question 14

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

Answer 14

RAAS operates automatically, without any action from the Flight Crew.

Question 15

What are the TCAS traffic advisory symbols? Resolution advisory signals?

Answer 15

The Traffic Advisory (TA) symbol appears as an amber dot at the proper range and relative bearing to the other aircraft. A TA is generated when the other aircraft is approximately 40 seconds from the point of closest approach.

A Resolution Advisory (RA) symbol appears as a red box and is generated if the other aircraft continues to close, and is approximately 25 seconds from the point of closest approach.

Question 16

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

Answer 16

CLEAR OF CONFLICT - RA encounter terminated. Maneuver guidance no longer displayed.

MONITOR VERTICAL SPEED - Present pitch attitude is outside the RA pitch
command area. Keep pitch attitude away.

Question 17

What are the indications of a Resolution Advisory on the PFD?

Answer 17

Traffic Alert and Collision Avoidance System Pitch Command (red) is indicated
by the area inside the red lines. The area(s) inside the red lines indicate(s) the pitch region(s) to avoid in order to resolve the traffic conflict. The Airplane Symbol must be outside the TCAS pitch command area(s) to ensure traffic avoidance.