Hey all...
Quick question about the 737NG's GPWS windshear alerts (
not PWS).
The Boeing FCOM says this in the Warning Systems chapter:
Windshear warnings are accompanied by WINDSHEAR on the attitude indicators and voice aural alerts.
Windshear cautions are accompanied by a voice aural alert.
So am I to understand that, a windshear caution has no yellow
WINDSHEAR caption on the PFD below the attitude sphere? In other words, just a "WINDSHEAR, WINDSHEAR" aural warning? Then why, during the GPWS test, do we see a flashing
WINDSHEAR followed by
WINDSHEAR?
Also, the FCOM has no information about what data the GPWC uses to issue the windshear alerts. I assume it's something to to with rate of change of groundspeed versus airspeed... does anyone know for sure?