Predictive Windshear (Pws) Detection - Honeywell IntuVue RDR-7000 Pilot's Manual

PREDICTIVE WINDSHEAR (PWS) DETECTION

The predictive windshear feature detects the presence of
windshearup to 5nmahead of the aircraft, giving 10 to 60 seconds of
warning before the encounter. Windshear detection mode operates
automatically below 1,800 feetabove ground level (AGL), with alerts
available at 1,500 feet AGL and below. If a windshear event is
detected, the system provides the crew with Advisory, Caution and/or
Warning annunciations, and a windshear icon shows on the weather
display. This system is meant to supplement other means of
detecting and avoiding hazardous windshear conditions. It will not
detect all possible hazardous windshear conditions such as
extremely dry events or events masked by unusual radar clutter.
AUTOMATIC WINDSHEAR ACTIVATION
The Windshear mode will automatically be turned on under the
following specific aircraft conditions:
In Air: Below 1,800 feet. AGL
On Ground: Depends on installation. Typical trigger conditions
include one or more of the following:

RAAS indicates On Runway

Groundspeed is greater than 30 knots

Longitudinal acceleration is greater than 0.15.
If the display is showing radar data other than weather (such as
gmap or standby) when a windshear event takes place, the display
automatically switches into the WX ALL mode, and the windshear
icon is overlaid on the weather data. Unless the pilot changes the
display settings, the display will return to its previous state once the
windshear event is no longer detected.
If the display is showing data other than weather (such as ground
proximity terrain data) when a windshear event takes place, the radar
will provide the aural and lamp or text annunciations, depending on
the installation. Change to any weather mode to see the windshear
icons that identify the location of the threat.
WINDSHEAR ALERT REGIONS
 The PWS mode can generate three types of alerts; Advisory,
Caution, and Warning. Thesedepend on the location of the
windshear event, not the strength. When a windshear event is
encountered below 1,500 feet AGL, the appropriate alert is issued,
and the icon automatically shows on the display. As an installation
choice, all advisory alerts may be suppressed.
Expanded Operating Instructions
24
IntuVueRDR-7000 Weather Radar Pilot's Guide
D201911000094
Rev 0, Feb 2020