CREW
AWARENESS
AIRPLANE
OPERATIONS
MANUAL
2-04-05
Page
2
Code
01
JUNE 28, 2002
− One Tuning Backup Control Head;
− Independent Standby Instruments or one Integrated Standby
Instruments System (ISIS);
− Two Integrated Navigation Computers;
− Two Integrated Communication Computers;
− Three Digital Audio Panels (DAP);
− Two Attitude and Heading Reference System (AHRS) or Two Inertial
Reference System (IRS);
− Two Air Data Computers (ADC);
− One Ground Proximity Warning System (GPWS) or Enhanced
Ground Proximity Warning System (EGPWS);
− One Aural Warning Unit (AWU);
− One Cockpit Voice Recorder (CVR);
− One Flight Data Recorder System (FDR);
− One or two Flight Management Systems (FMS);
− One Traffic and Collision Avoidance System (TCAS);
− One Radar System;
− One Stall Protection System (SPS).
The primary components of such integration are the IC-600 units,
which exchange information with all the other components, either
directly or through auxiliary computers. The IC-600s are responsible
for the interface among the many airplane systems, besides managing
information presented on the displays. Each IC-600 computes the
received data and sends the appropriate information to the displays.
The DAUs are the central data collection points for the EICAS. DAU 1
is dedicated to collect data from the forward airplane systems and left
engine. DAU 2 collects data from the aft airplane systems and right
engine. Engine data is sent to the DAUs through the FADECs and
directly from the engine sensors.
The discrete signals collected by the DAUs are converted into digital
signals and sent to the Integrated Computer (IC-600). In the IC 600
there is a symbol generator which provides images to Display Units.
Each DAU is a dual (A and B) channel unit. Channels B on both DAUs
are kept as a standby source, which must be manually selected,
through the DAU reversionary button in case of a channel A DAU
failure. Both IC-600s use channel A of on-side DAU as the primary
source of information.
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