Copyright . The Boeing Company. See title page for details.
June 1, 2003 15.20.13
Warning Systems -System Description 737 Flight Crew Operations Manual
Windshear Alerts
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 flight crew 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)
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.
Predictive Windshear Alerts
The weather radar uses radar imaging to detect disturbed air prior to entering a windshear.
Note: The weather radar provides windshear alerts for windshear events containing some level of moisture or particulate matter.
Note: 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.
Copyright . The Boeing Company. See title page for details.
15.20.14 September 27, 2004
Warning Systems -System Description
AURAL ALERT VISUAL ALERT DESCRIPTION
WINDSHEAR Red WINDSHEAR Windshear close to and directly ahead of the
AHEAD on both attitude airplane detected by the weather radar.
indicators Enabled during takeoff, below 1,200 feet RA.
RED windshear symbol on navigation display Predictive windshear symbol on the navigation display shows windshear position (expanded MAP, center MAP, and expanded
Red WINDSHEAR VOR or APP modes only).
message on
navigation display
(all modes)
GO AROUND, Red WINDSHEAR Windshear within 1.5 miles and directly
WINDSHEAR on both attitude ahead of the airplane detected by the weather
AHEAD indicators radar.
RED windshear Enabled during approach, below 1,200 feet
symbol on RA.
navigation display Predictive windshear symbol on the
Red WINDSHEAR navigation display shows windshear position
message on (expanded MAP, center MAP, and expanded
navigation display VOR or APP modes only).
(all modes)
MONITOR RED windshear Windshear within 3 miles and ahead of the
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址:737NG机组操作手册Flight Crew Operations Manual FCOM 3(160)