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Engine indication and crew alerting system (EICAS);
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Flight data recording; and
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Maintenance diagnostics.
Aural/Visual Warnings
Figure 03.10.1
ENGINE INDICATION AND CREW ALERTING SYSTEM
General Description
The engine indication and crew alerting system (EICAS) processes inputs from aircraft systems to provide visual information and aural alerts to the crew.
In general terms, the function of EICAS is to:
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Process and display engine parameters and related information;
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Process and display system parameters and related information;
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Provide a graphical depiction of certain airframe systems for the purpose of in-flight health monitoring;
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Process and provide visual and aural alerts to the crew;
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Provide aural warning when the aircraft is not in proper takeoff configuration; and
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Process information for the flight data recorder.
AURAL/VISUAL WARNING SYSTEM Description Vol. 2 03.10.2
Oct 05/06
Components
EICAS includes those components that receive, process and display information. The EICAS components also provide audio signals to the audio system for voice and aural annunciations and operating and flight parameter data to the flight data recorder. Major components and controls include:
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Four adaptive flight displays;
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Two data concentrator units;
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One lamp driver unit;
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Two cursor control panels;
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One reversionary control panel;
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Two master warning/caution switch/lights;
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One audio warning panel; and
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One miscellaneous test panel.
AURAL/VISUAL WARNING SYSTEM Description Vol. 2 03.10.3
Oct 05/06
Aural/Visual Warning Control Panels
Figure 03.10.2
AURAL/VISUAL WARNING SYSTEM Description Vol. 2 03.10.4
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Adaptive Flight Displays
The four liquid-crystal adaptive flight displays (AFDs) are used as part of the electronic flight instrument (EFIS) and EICAS systems. The outer AFDs are normally configured as primary flight displays (PFDs) while the inner AFDs are configured as multifunction displays (MFDs). EICAS information is normally presented on the left MFD, however, it can also be displayed on the right MFD. Under certain conditions the EICAS information can also be presented on the PFDs.
Adaptive Flight Displays Figure 03.10.3
Data Concentrator Units
The aircraft is equipped with two independently operating data concentrator units (DCUs). The DCUs, located in the avionics compartment, contain the processing software required for the operation of the adaptive flight displays. The AFDs render EICAS displays based on inputs from the DCUs. The software also contains the equations that define the crew alerting function of the EICAS. These crew alerting functions include the voice and aural tones and annunciations produced by the audio system.
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