Windshear

Question 1

How does Reactive Windshear system generate warnings?

Answer 1

Generated by the FACs which gather inputs from ADIRS, AoA sensors, power settings etc.
FACs express this info as an AoA and compare it to an AoA threshold above which windshear is likely

Question 2

What does PWS use to generate warnings?

Answer 2

Uses weather radar (Doppler shift)

Question 3

When is RWS available during take off and approach?

Answer 3

3s after lift off until 1300ft RA

1300ft RA until 50ft

Question 4

When is PWS available during take off and approach?

Answer 4

During TO up to 100kts (3nm ahead)
50ft RA after lift off until 2300ft (5nm ahead)

2300ft RA until 50ft RA (warnings are cautions below 370ft)