SH Chapter 15 - Warning Systems

Question 1

1) What capabilities does the RADAR system have?

Answer 1

• Weather avoidance
• Turbulence detection
• Ground mapping
• Prediction windshear (PWS)

Question 2

2) Will weather radar be displayed on the ND if the TERR pb is ON?

Answer 2

No

Question 3

3) Within what range is WX/TURB mode available?

Answer 3

40 miles ahead of aircraft

Question 4

4) Does predictive windshear detection work when the RADAR system is switched OFF?

Answer 4

Yes, as long as at least one engine running and ground speed greater than 30kts, or aircraft longitudinal acceleration is above a given threshold for at least 0.5 seconds.

Question 5

5) What is the forward scanned area of the predictive windshear detection feature?

Answer 5

5nm ahead and 30 degrees either side of aircraft flight path.

Question 6

6) When are predictive windshear alerts inhibited?

Answer 6

Above 100kts up to 50’ on take off. During landing, inhibited below 50’.

Question 7

7) How many RADAR systems are installed?

Answer 7

Tails 281-286, 361-365, 846-855VA and 321s have single weather radar.
639-642VA have two weather radars.