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‐ above 82 ° North
‐ above 73 ° North between 90 ° and 120 ° West (magnetic polar region)
‐ above 60 ° South
‐ one ADIRS control panel (ADIRS CDU) on the overhead panel for selection of modes (NAV, ATT,
OFF) and indications of failures.
The IR is normally initialized through the FMGS, but the ADIRS CDU may be used as a back up.
‐ four types of sensors :
• pitot probes (3)
• static pressure probes (STAT) (6)
• angle of attack sensors (AOA) (3)
• total air temperature probes (TAT) (2)
These sensors are electrically heated to prevent from icing up.
eight ADMs (Air Data Modules) which convert pneumatic data ‐ from PITOT and STAT probes into
numerical data for the ADIRUs.
‐ a switching facility for selecting ADR3 or IR3 for instrument displays in case of ADIRU 1 or 2
failure.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-10-10 P 2/8
FCOM 19 AUG 10
GENERAL
Applicable to:
,
,
MSN,,,,
The Air Data and Inertial Reference System (ADIRS) supplies temperature, anemometric, barometric
and inertial parameters to the EFIS system (PFD and ND) and to other user systems (FMGC,
FADEC, ELAC, SEC, FAC, FWC, SFCC, ATC, GPWS, CFDIU, CPC).
The system includes :
‐ three identical ADIRU’s (Air Data and Inertial Reference Units).
Each ADIRU is divided in two parts, either of which can work separately in case of failure in the
other :
• the ADR part (Air Data Reference) which supplies barometric altitude, airspeed, mach, angle of
attack, temperature and overspeed warnings.
• the IR part (Inertial Reference) which supplies attitude, flight path vector, track, heading,
accelerations, angular rates, ground speed and aircraft position.
Note: The ADIRU gives true heading instead of magnetic heading :
‐ above 82 ° North
‐ above 73 ° North between 90 ° and 120 ° West (magnetic polar region)
‐ above 60 ° South
‐ one ADIRS control panel (ADIRS CDU) on the overhead panel for selection of modes (NAV, ATT,
OFF) and indications of failures.
The IR is normally initialized through the FMGS, but the ADIRS CDU may be used as a back up.
‐ two GPS receivers, which are connected to the IR part of the ADIRU’s for GP/IR hybrid position
calculation.
‐ four types of sensors :
• pitot probes (3)
• static pressure probes (STAT) (6)
• angle of attack sensors (AOA) (3)
• total air temperature probes (TAT) (2)
These sensors are electrically heated to prevent from icing up.
eight ADMs (Air Data Modules) which convert pneumatic data ‐ from PITOT and STAT probes into
numerical data for the ADIRUs.
‐ a switching facility for selecting ADR3 or IR3 for instrument displays in case of ADIRU 1 or 2
failure.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-10-10 P 3/8
FCOM 19 AUG 10
PROBES LOCATION
Applicable to: ALL
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-10-10 P 4/8
FCOM 19 AUG 10
PROBES SCHEMATIC
Applicable to: ALL
Note: ADIRU (1) is supplied by CAPT probes,
ADIRU (2) is supplied by F/O probes,
ADIRU (3) is supplied by STBY probes and CAPT TAT.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-10-10 P 5/8
FCOM 19 AUG 10
ADIRS SCHEMATIC
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-10-10 P 6/8
FCOM 19 AUG 10
ADIRS SCHEMATIC
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-10-10 P 7/8
FCOM 19 AUG 10
ADIRS SCHEMATIC
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - DESCRIPTION
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-34-10-10 P 8/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ADIRS - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-10-20 P 1/6
FCOM 19 AUG 10
OVERHEAD PANEL
　
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