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May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 215
ALL
WR/PWS SYSTEM PRESENTATION
WR INDICATING
The Weather Radar image is shown on the Captain and
First Officer Navigation Displays.
Radar image and radar information status (TILT, GAIN,
failure) are displayed in the different EFIS modes
(ARC and ROSE) except in PLAN mode.
PWS INDICATING (OPTION)
The Predictive Windshear indications are shown on the
Captain and F/O PFDs and NDs.
The windshear phenomenon is indicated by an icon
superimposed on the radar image in the different EFIS
modes (ARC and ROSE) except in PLAN mode.
TMUWPWA02-T04 LEVEL 1
EFFECTIVITY 34-41-00 Page 8
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 216
ALL
WR/PWS SYSTEM PRESENTATION - WR AND PWS INDICATING
TMUWPWA02-P04 LEVEL 1
EFFECTIVITY 34-41-00 Page 9
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 217
ALL
SELF EXAMINATION
Windshear indications are shown:
A - Only on the NDs.
B - On the PFDs and the NDs.
C - On the Upper ECAM DU.
TMUWPWA02 LEVEL 1
EFFECTIVITY 34-41-00 Page 10
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 218
ALL
34 - NAVIGATION
34-41-00 WR/PWS DESCRIPTION/OPERATION
CONTENTS:
General
System Description
System Interfaces
Indicating
Self Examination
TMUWPWC01 LEVEL 3
EFFECTIVITY 34-41-00 Page 1
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 219
ALL
WR/PWS DESCRIPTION/OPERATION
GENERAL
The Weather Radar and Predictive Windshear System
(WR/PWS) is composed of:
- 1 control unit,
- 1 transceiver (WR/PWS),
- 1 antenna,
- 1 wave guide.
Note: The PWS function is optional.
SYSTEM DESCRIPTION
CONTROL UNIT
The Control Unit provides modes of operation, antenna
tilt and gain of the receiver digitized information,
via an ARINC 429 bus.
An ON/OFF discrete ensures the energization of the
transceiver which in turn supplies the control unit
and the antenna.
Two other discrete signals enable:
- the windshear function (through AUTO/OFF
switch)
- BITE management, sent to the CFDIU.
TRANSCEIVER
The Weather Radar uses the principle of radio echoing
to detect the level of precipitation, the ground map,
and the principle of Doppler effect to detect the
turbulence areas.
The transmitter operates in X-Band frequency at 9345
MHz.
The PWS function also uses the principle of Doppler
effect to detect windshear events.
Horizontal and vertical wind velocity, gravity and
aircraft true airspeed are the different windshear
components for the determination of the windshear
threshold.
ANTENNA
The Weather Radar antenna is energized and controlled
in azimuth and elevation by the transceiver.
The radio frequency signals are exchanged between the
transceiver and the antenna, via a wave guide.
The antenna scans a 180° sector in azimuth and has a
tilt coverage of + or - 15°.
An internal circuit of the transceiver ensures antenna
stabilization.
The stabilization data is: pitch and roll angles,
selected tilt, antenna azimuth and elevation angle.
TMUWPWC01-T01 LEVEL 3
EFFECTIVITY 34-41-00 Page 2
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 220
ALL
WR/PWS DESCRIPTION/OPERATION - GENERAL - SYSTEM DESCRIPTION
TMUWPWC01-P01 LEVEL 3
EFFECTIVITY 34-41-00 Page 3
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 221
ALL
WR/PWS DESCRIPTION/OPERATION
SYSTEM INTERFACES
ADIRUs
The WR receives, from Air Data and Inertial Reference
Units (ADIRUs) one and three, pitch and roll data, for
the stabilization and control of the antenna, and
ground speed for Doppler mode correction.
The ADIRU, which provides data, is selected by means
of the ATT/HDG selector switch.
The PWS function receives data from ADIRU 1 and 3 for
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