Air data module explained

An air data module is a component of the navigation system.[1] Each unit converts pneumatic (air pressure) information from a pitot tube or a static port into numerical information which is sent on a data bus.[2] This pressure information is received and processed by the Air Data Reference (ADR) component of the Air Data Inertial Reference Unit (ADIRU).[1] This processed information is then sent to one or more display management computers that present information on the cockpit's primary flight display.[3] Airspeed information is also sent to the flight computers and other electronics,[4] including the autoflight subsystem (e.g. flight management and guidance system).[5]

Construction

The air data module is a gas pressure sensor which converts mechanical forces created by gas pressure into digital signals that can be carried to the air data reference unit. ADMs generally have a maintenance bus and communication bus, and a connector on the housing for a pressurized gas line that is connected to the pitot tube or static ports. The maintenance bus can be EIA-485 and the communication bus can be ARINC 429[2] [6]

Notes and References

  1. Web site: SmartCockpit: Airline training guides - Aviation, Operations, Safety . dead . https://archive.today/20070115043457/http://www.smartcockpit.com/pdf/plane/airbus/A330/systems/0019/ . 2007-01-15 .
  2. Web site: Erroneous flight instruments . 2008-07-14 . Boeing Aero Magazine, Issue 08. https://web.archive.org/web/20080612001822/http://www.boeing.com/commercial/aeromagazine/aero_08/erroneous_textonly.html. 12 June 2008 . live.
  3. Web site: SmartCockpit: A330 - Systems - Indicating and Recording . https://archive.today/20070115043436/http://www.smartcockpit.com/pdf/plane/airbus/A330/systems/0014/ . dead . 2007-01-15 .
  4. Web site: SmartCockpit: A330 - Control systems . dead . https://archive.today/20090612084314/http://www.smartcockpit.com/pdf/plane/airbus/A330/systems/0010/ . 2009-06-12 .
  5. Web site: SmartCockpit: A330 - Autoflight systems . https://archive.today/20070115043256/http://www.smartcockpit.com/pdf/plane/airbus/A330/systems/0004/ . dead . 2007-01-15 .
  6. Web site: www51.honeywell.com . 2016-03-03 . https://web.archive.org/web/20160303170855/http://www51.honeywell.com/aero/common/documents/Air_Data_Module.pdf . dead .

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