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(5) GND CLTR SPRS
ON : The Ground Clutter Suppresses the ground echo on the screen.
OFF : Normal use of the radar.
Note: Setting different scales on the ND reduces the sweep rate of each ND image. (8 s
instead of 4 s).
(6) PWS selector (operative, only if the windshear function is embodied)
AUTO : Windshear function is activated. Windshear areas will be detected by the antenna
scanning below 1 500 ft RA, even if the transceiver selector (1) is set to OFF, and
displayed on the ND.
OFF : No windshear function.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WINDSHEAR PREDICTION SYSTEM
A330/A340 FLEET DSC-34-60-30 P 1/6
FCOM 19 AUG 10
WINDSHEAR PREDICTION FUNCTION
Applicable to: ALL
The weather radars have a Predictive Windshear System (PWS) that operates when :
The PWS switch is in the AUTO position (Even ‐ if the weather radar is OFF), and
‐ The aircraft is below 2 300 ft AGL, and
‐ The ATC is switched to the ON or AUTO position (or XPNDR ), and
‐ Either engine is running.
Note: When two weather radars are installed, if the selected weather radar fails, the PWS function
is recovered by selecting the non-failed weather radar on the control panel.
The system scans the airspace, within a range of 5 nm ahead of the aircraft, for windshears.
Below 1 500 ft, when the system detects windshear, and depending on the range selected on the
ND, a warning, caution or advisory message appears on the ND. Predictive windshear warnings and
cautions are associated with an aural warning.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WINDSHEAR PREDICTION SYSTEM
A330/A340 FLEET DSC-34-60-30 P 2/6
FCOM 19 AUG 10
WINDSHEAR ALERTS DURING TAKEOFF ROLL, UP TO 100 KNOTS
Applicable to:
During the takeoff roll, up to 100 kt, both warnings and cautions are available within a range of 3 nm.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WINDSHEAR PREDICTION SYSTEM
A330/A340 FLEET DSC-34-60-30 P 3/6
FCOM 19 AUG 10
WINDSHEAR ALERTS DURING TAKEOFF ROLL, UP TO 100 KNOTS
Applicable to: ,
During the takeoff roll, up to 100 kt, both warnings and cautions are available within a range of 3 nm.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WINDSHEAR PREDICTION SYSTEM
A330/A340 FLEET DSC-34-60-30 P 4/6
FCOM 19 AUG 10
WINDSHEAR ALERTS ABOVE 50 FEET
Applicable to:
During final approach, the visual and aural warning alerts are downgraded to caution alerts between
370 ft AGL and 50 ft AGL, and range between 1.5 nm and 0.5 nm.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WINDSHEAR PREDICTION SYSTEM
A330/A340 FLEET DSC-34-60-30 P 5/6
FCOM 19 AUG 10
WINDSHEAR ALERTS ABOVE 50 FEET
Applicable to: ,
During final approach, the visual and aural warning alerts are downgraded to caution alerts between
370 ft AGL and 50 ft AGL, and range between 1.5 nm and 0.5 nm.
WINDSHEAR ALERTS INHIBITION
Applicable to: ALL
At takeoff, alerts are inhibited above 100 kt and up to 50 ft. During landing, alerts are inhibited below
50 ft.
Alert Level AuralWarning PFD
ND (Refer to DSC-31-45
PREDICTIVE
WINDSHEAR SYSTEM)
Warning (Approach) «GO AROUND
WINDSHEAR AHEAD» W/S AHEAD (red) Windshear icon
Warning (Takeoff) «WINDSHEAR
AHEAD» (twice) W/S AHEAD (red) Windshear icon
Caution «MONITOR
RADAR DISPLAY» W/S AHEAD (amber) Windshear icon
Advisory Nil Nil Windshear icon
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WINDSHEAR PREDICTION SYSTEM
A330/A340 FLEET DSC-34-60-30 P 6/6
FCOM 19 AUG 10
The aural alerts of the Predictive Windshear System (PWS) :
Have priority over TCAS, GPWS ‐ and other FWC aural warnings.
‐ Are inhibited by windshear detection, by the FMGC, and stall warning aural messages.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
WEATHER RADAR - WARNING AND CAUTIONS
A330/A340 FLEET DSC-34-60-40 P 1/2
FCOM 19 AUG 10
WARNING AND CAUTIONS
Applicable to:
E/WD : FAILURE TITLE
conditions
AURAL
WARNING MASTER LIGHT SD PAGE
CALLED
LOCAL
WARNING
FLT PHASE
INHIB
PRED. W/S DET FAULT SINGLE CHIME MASTER
CAUTION NIL NIL 3, 4, 5, 8
MEMO DISPLAY
The “PRED W/S OFF” message appears, when the windshear is set to OFF on the weather radar
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 3(130)
