Boeing 787-8 - Alert Inhibits

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Warning Systems -
System Description
Copyright © The Boeing Company. See title page for details.
15.20.32 D615Z003-TBC
Note: Weather radar provides windshear alerts for windshear events containing
some level of moisture or particulate matter.
Note: Weather radar detects microbursts and other windshears with similar
characteristics. Weather radar does not provide alerting for all types of
windshear. The flight crew must continue to rely on traditional windshear
avoidance methods.
Immediate Windshear Alerts
Alert Inhibits
Alerts are inhibited when they are operationally unnecessary or inappropriate.
Alerts are inhibited during normal system operation, and during part of the takeoff
and landing to prevent distracting the crew.
GPWS immediate windshear alert inhibits all PWS, TCAS, and other GPWS
alerts.
Voi ce
Annunciation
Visual
Indications Description
WINDSHEAR
AHEAD
Master WARNING
lights
Red WINDSHEAR
on both PFDs
Red WINDSHEAR
message on the
NDs and mini-maps
RED, BLACK and
YELLOW
windshear symbol
on the NDs and
mini-maps
WINDSHEAR on
both HUDs
Windshear predicted close to and directly
ahead of airplane.
Enabled during takeoff, below 1,200 feet
radio altitude.
Windshear position displayed by PWS
symbol on the NDs and mini-maps.
Voi ce
Annunciation
Visual
Indications Description
(Siren)
WINDSHEAR,
WINDSHEAR,
WINDSHEAR
Master WARNING
lights
Red WINDSHEAR
on both PFDs
WINDSHEAR on
both HUDs
Excessive windshear detected by GPWS.
Enabled below 1,500 feet radio altitude.
GPWS windshear detection begins at
rotation.
February 15, 2010