Air data module

Illustration of the airspeed indication and detection system on fly-by-wire aircraft

Air Data Module is a component of the navigation system on fly-by-wire aircraft, such as Airbus A320 or later Airbus. Each unit converts pneumatic (air pressure) information from a Pitot tube or a static port in to numerical information which is sent on the ARINC 429 data bus. This pressure information is received and processed by the Air Data Reference (ADR) component of the Air Data Inertial Reference Unit (ADIRU). This processed information is then sent to a display management computer(s) that present information on the cockpit's primary flight display. Airspeed information is also sent to the flight computers and other electronics. Airspeed information is also sent to the autoflight subsystem (.e.g flight management and guidance system).