Windshear Alerts
Aural Alert
 Visual Alert
 Description
Two–tone siren
followed by
WINDSHEAR
 Red WINDSHEAR on both
attitude indicators.
 Excessive windshear at the
current airplane position
detected by GPWS.

Enabled below 1,500 feet RA.
GPWS Windshear detection
begins at rotation.

Windshear alerts are available during takeoff, approach, and landing:

  • The GPWS provides a warning when the airplane is in a windshear.
  • The weather radar provides alerts for excessive windshear ahead of the
    airplane. These are “predictive windshear alerts.”

Windshear warnings are accompanied by WINDSHEAR on the attitude indicators
and voice aural alerts.
Windshear cautions are accompanied by a voice aural alert.
Windshear alerts are prioritized based on the level of hazard and the required
flightcrew reaction time. Predictive windshear alerts are inhibited by an actual
windshear warning (airplane in windshear), look-ahead terrain alerts, or radio
altitude based alerts.
Windshear Warning (Airplane in Windshear)