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UF94200
EFFECTIVITY Page 67
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ADIRS CDU PRESENTATION
AIR DATA REFERENCE P/BSW
The output buses of each air data reference are
disconnected when its related pushbutton switch is set
to OFF position.
An amber FAULT light comes on accompanied by ECAM
activation when a fault is detected in the related Air
Data Reference.
TMUNAV101-T01 LEVEL 1
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TMUNAV101 LEVEL 1
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ADIRS CDU PRESENTATION
DATA SELECTOR
The Data Selector permits the display of the selected
Inertial Reference data and status.
TMUNAV101-T02 LEVEL 1
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ADIRS CDU PRESENTATION - DATA SELECTOR
TMUNAV101-P02 LEVEL 1
EFFECTIVITY 34-10-00 Page 7
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ADIRS CDU PRESENTATION - DATA DISPLAY
TMUNAV101-P03 LEVEL 1
EFFECTIVITY 34-10-00 Page 8
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ADIRS CDU PRESENTATION - STATUS MESSAGES
TMUNAV101-P04 LEVEL 1
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TMUNAV101-P05 LEVEL 1
ADIRS CDU PRESENTATION - STATUS ACTION CODES
EFFECTIVITY 34-10-00 Page 10
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SELF EXAMINATION
The inertial data, TK/GS, PPOS, WIND, HDG are
available on:
A - ATT only.
B - NAV only.
C - ATT or NAV.
When does the ALIGN light flash?
A - Within five minutes of NAV mode
selection, when present position has not
been entered.
B - During the alignment phase in case of
IRS alignment error.
C - When alignment has been completed.
TMUNAV101 LEVEL 1
EFFECTIVITY 34-10-00 Page 11
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TMUNAV101 LEVEL 1
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34 - NAVIGATION
34-10-00 ADIRS SWITCHING
CONTENTS:
General
Principle
Switching Example
TMUNAV201 LEVEL 3
EFFECTIVITY 34-10-00 Page 1
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
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ADIRS SWITCHING
GENERAL
The Air Data Inertial Reference System (ADIRS) is
composed of three Air Data Inertial Reference Units
(ADIRUs)
PRINCIPLE
Various instruments and systems receive data from
the ADIRS for inertial and air data display:
- The Primary Flight Displays (PFDs),
- The Navigation Displays (NDs),
- The ECAM System Display (SD)
- The Digital Distance and Radio Magnetic
Indicator (DDRMI).
The ADIRS provides:
- Barometric altitude to the Air Traffic Control
(ATC) system for mode S.
- Data to the Flight Augmentation Computers
(FACs) for computation of various
characteristic speeds.
- Data to the Weather Radar (WR) system for
antenna attitude stabilization.
Basically, ADIRU1 is associated with systems 1 and
the DDRMI, ADIRU2 with systems 2, ADIRU3 is in
standby.
If an Air Data Reference (ADR) or an Inertial
Reference (IR) fails, the AIR DATA or ATT HDG
selectors enable the crew to use ADR 3 or IR 3.
The manual switching is mainly performed to recover
displays.
The computers select their inputs according to the
switching for consistency of computation and display.
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