Eclipse 500 System Manual page 295

Section 13. Air Data
13.2 Aircraft Computer System (ACS) Interfaces
The air data system is comprised of two Integrated Sensor Suites (left and right) that
serve as the fourth of five major components of the integrated avionics. An
Integrated Sensor Suite is further divided into three major components:
Air Data Computers (ADC)
Attitude Heading and Reference System (AHRS)
Global Positioning System (GPS)
Information collected by the Integrated Sensor Suites is sent to three places within
the airplane: both Aircraft Computer Systems (ACS') for comparison and failure
monitoring, the Full-Authority Digital Engine Control Units (FADECs) for engine
control and to the PFD's and MFD for display to the pilot.
A left and right Air Data computer, serve as the primary air data sources for the left
and right PFDs. They are responsible for collecting inputs from the two dual static
ports, two pitot/angle of attack probes, and two outside air temperature probes. The
air data computers process this information and send it to the AHRS for distribution to
the aircraft systems.
GPS information is collected by two GPS units and sent to the AHRS for distribution
to the aircraft systems.
Two Attitude Heading and Reference Systems serve as the primary attitude and
heading sources for the left and right PFD's as well as the MFD Attitude Indicator
(ADI). The AHRS units use two magnetometers located in the horizontal stabilizer to
collect, then provide attitude and magnetic heading information to the aircraft
systems. A separate information processor within the AHRS unit serves to collect,
combine if necessary and distribute information from the ADC, AHRS and GPS to the
ACS', FADEC's and Pilot Displays for use.
A third, independent pitot/static probe is considered Air Data Computer three and
provides pitot/static information directly to the ACS'. Air data information from ADC
three is the solo air data source for the MFD Attitude Indicator (ADI).
There are two pieces of information that are returned to the Integrated Sensor Suites
for correction purposes, these are:
1. RAIM (Radio Autonomous Integrity Monitoring) information to the GPS units
2. BARO (Altimeter Setting) correction to the Air Data Computers
Version 2.0 April 2007
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