Air data inertial reference unit: Difference between revisions

Revision as of 11:35, 19 September 2019

Revision as of 12:49, 19 September 2019

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|title=738-3 Air Data and Inertial Reference System (ADIRS)

|publisher=[[ARINC]]

|accessdateaccess-date=14 July 2008

|year=2008

|archive-url=https://web.archive.org/web/20110525194835/https://www.arinc.com/cf/store/catalog_detail.cfm?item_id=280

|archive-date=25 May 2011

|dead-url-status=yesdead

|df=dmy-all

}}

</ref> The No 3 ADIRU is a [[Redundancy (engineering)|redundant]] unit that may be selected to supply data to either the commander's or the co-pilot's displays in the event of a partial or complete failure of either the No 1 or No 2 ADIRU. There is no cross-channel redundancy between the Nos 1 and 2 ADIRUs, as No 3 ADIRU is the only alternate source of air and inertial reference data. An inertial reference (IR) fault in ADIRU No 1 or 2 will cause a loss of [[Angle of attack|attitude]] and navigation information on their associated [[EFIS#Primary flight display (PFD)|primary flight display]] (PFD) and navigation display (ND) screens. An air data reference (ADR) fault will cause the loss of airspeed and altitude information on the affected display. In either case the information can only be restored by selecting the No 3 ADIRU.<ref name="art5" />

Each ADIRU comprises an ADR and an inertial reference (IR) component.<ref name="urlA330 - Navigation">{{cite web|publisher=smartcockpit.com |url=http://www.smartcockpit.com/pdf/plane/airbus/A330/systems/0019/ |archive-url=https://archive.is/20070115043457/http://www.smartcockpit.com/pdf/plane/airbus/A330/systems/0019/ |dead-url-status=yesdead |archive-date=15 January 2007 |title=Airline training guides, Aviation, Operations, Safety -Navigation A330 |work= |accessdateaccess-date=12 June 2009 }}</ref>

===Air data reference===

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|url=http://www.boeing.com/commercial/aeromagazine/aero_08/erroneous_textonly.html

|title=Erroneous flight instruments

|accessdateaccess-date=2008-07-14

|publisher=Boeing Aero Magazine, Issue 08

| archiveurlarchive-url= https://web.archive.org/web/20080612001822/http://www.boeing.com/commercial/aeromagazine/aero_08/erroneous_textonly.html| archivedatearchive-date= 12 June 2008 <!--DASHBot-->| deadurlurl-status= nolive}}</ref> Ram air pressure and static pressures used in calculating [[airspeed]] are measured by small ADMs located as close as possible to the respective [[Pitot tube|pitot]] and static pressure sensors. ADMs transmit their pressures to the ADIRUs through [[ARINC 429]] data buses.<ref>{{cite web |url=http://www51.honeywell.com/aero/common/documents/Air_Data_Module.pdf |publisher=Honeywell |title=Air Data Module |accessdate=25 December 2016 }}</ref>

===Inertial reference===

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|publisher = Australian [[Civil Aviation Safety Authority]]

|date = April 27, 2000

|deadurlurl-status = yesdead

|archiveurlarchive-url = https://web.archive.org/web/20080805050006/http://casa.gov.au/airworth/airwd/ADfiles/equip/inst/INST-045.pdf

|archivedatearchive-date = August 5, 2008

|df =

}}</ref>

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|year = 2006

|publisher = UK [[Air Accidents Investigation Branch]]

|accessdateaccess-date = 2008-10-15

|archive-url = https://web.archive.org/web/20081022221023/http://www.aaib.dft.gov.uk/cms_resources/Airbus%20A320-200,%20I-BIKE%2006-06.pdf

|archive-date = 2008-10-22

|dead-url-status = yesdead

|df =

}}</ref>

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|publisher=[[Australian Broadcasting Corporation]]

|date=14 October 2008

|accessdateaccess-date=2008-10-15

| archiveurlarchive-url= https://web.archive.org/web/20081016061452/http://www.abc.net.au/news/stories/2008/10/14/2391134.htm| archivedatearchive-date= 16 October 2008 <!--DASHBot-->| deadurlurl-status= nolive}}</ref><ref>{{cite news

|url = http://www.theaustralian.news.com.au/business/story/0,28124,24506830-36418,00.html

|title = US tests on false data sent on Qantas jet over WA

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|archive-url = https://web.archive.org/web/20081017192530/http://www.theaustralian.news.com.au/business/story/0,28124,24506830-36418,00.html

|archive-date = 2008-10-17

|dead-url-status = yesdead

|df =

}}</ref>

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| date = 2 January 2009

| url = http://www.atsb.gov.au/newsroom/2009/release/2009_01.aspx

| accessdateaccess-date = 6 January 2009

| archiveurlarchive-url= https://web.archive.org/web/20090110000406/http://www.atsb.gov.au/newsroom/2009/release/2009_01.aspx| archivedatearchive-date= 10 January 2009 <!--DASHBot-->| deadurlurl-status= nolive}}</ref>

===Emergency Airworthiness Directive No 2009-0012-E===

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==References==

{{reflistReflist}}

==Further reading==

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|work=Aero Magazine

|publisher=[[Boeing]]

|accessdateaccess-date=2008-10-16

| archiveurlarchive-url= https://web.archive.org/web/20080906001423/http://www.boeing.com/commercial/aeromagazine/aero_08/erroneous_textonly.html| archivedatearchive-date= 6 September 2008 <!--DASHBot-->| deadurlurl-status= nolive}}

* {{cite web|url=http://www.google.com/patents?id=Aw8PAAAAEBAJ&dq=6654685|title=US Patent 6654685 - Apparatus and method for navigation of an aircraft|date=2003-11-25|accessdate=2008-10-16|publisher=[[United States Patent Office]]|author =Melville Duncan W. McIntyre, [[Boeing]]}}