The system that detects the windshear
The Predictive Windshear (PWS) function: (Surveillance system. ie WXR)
Detects windshears:
At least 10 s before a possible encounter
Between 0.5 nm and 5 nm in front of the aircraft
Triggers alerts.
The PWS function can detect and display up to 8 different windshears simultaneously.
The PWS function is available, if the PRED W/S button is set to AUTO, and:
If the WXR is operative, or at takeoff, if the WXR is OFF
In flight, if the aircraft is below 1 500 ft AGL.
REACTIVE WINDSHEAR DETECTION
A windshear alert triggers, when the aircraft encounters wind gradients during takeoff and landing, which could reduce the margin towards stall.
The windshear alert consists of:
A red windshear message displayed on both PFD.
It flashes during 9 s, then remains steady, as long as the windshear is detected.
An aural WINDSHEAR alert
Windshear
The reactive windshear detection is performed by the PRIMs