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the four colors, generally the color logic is as follows:
• black, indicates no flow
• amber, indicates below normal values
• green, indicates normal value
• red, indicates exceeding normal values
EICAS Messages
The Crew Alerting System (CAS) provides visual and aural alerts when the DCUs
detect a malfunction. The CAS prioritizes messages by order of occurrence and
categorizes them by importance as follows:
• order of occurrence: The most recent message appears on the top of its message
category
• order of importance: There are four levels of CAS message importance: Warning,
Caution, Advisory and Status
Warning Messages
The most urgent messages are called Warnings and are red in color. Warning messages
are presented on the top of the primary page and remain in view until the problem is
resolved.
Warning messages require immediate action and are always accompanied by:
• a triple attenson
• flashing master warning lights
• red light on the faulted control switch or a red indication on EFIS, EICAS, or a
synoptic page
Warning messages, in addition to the above indications, can also generate one or both
of the following:
AURAL/VISUAL WARNING
For Training Purposes Only
May 03
3-15
P I LOT T R A I N I N G GU I D E
• aural warning tone
• voice message
Pressing either master warning switch/light:
• silences the aural alerts
• stops the master warning lights from flashing
• resets the switch/light to allow it to indicate another fault
Caution Messages
Caution messages are second in order of importance. Caution messages are presented
in amber on the primary page and appear directly below any warning messages that
may be displayed. It is possible to have more than one page of caution messages. The
CAS pushbutton on the ECP allows the pilot to page forward and backward to view
the entire list of caution messages. During flight or on the ground when both engines
are stabilized at idle, caution message(s) can be removed from view or recalled to the
screen by pressing the CAS key on the ECP. A white MSGS icon will appear, advising
the crew that the caution message(s) are out of view. Pressing the CAS button a second
time will cause the caution message(s) to reappear. DCU generation of a new caution
message will remove the MSGS icon and the new message will be displayed on the
top of the caution message stack.
Caution messages require prompt action and are always accompanied by:
• a single attenson
• flashing master caution lights
• amber light on the faulted control switch or an amber indication on EFIS, EICAS,
or a synoptic page
Pressing either master caution switch/light:
• stops the flashing of the master caution lights
• resets the master caution switch/light to allow it to annunciate another fault
Advisory Messages
Green advisory messages are presented at the top of the status page. Advisory
messages cannot be removed from view until the cause is deselected or deactivated.
Advisory messages are used to advise of:
• aircraft configuration for a particular phase of flight
• successful system test
• confirmation of SOV closure
• SELCAL
AURAL/VISUAL WARNING
3-16 For Training Purposes Only
Jan 04
P I LOT T R A I N I N G GU I D E
Status Messages
White status messages are presented on the status page and appear directly below any
advisory messages that may be present. Status message(s) can be removed from view
or recalled to the screen by pressing the STAT key on the ECP. A white MSGS icon
will appear, advising the crew that the status message(s) are out of view. Pressing the
STAT button a second time will allow the status message(s) to reappear. DCU
generation of a new status message will remove the MSGS icon and the new message
will be displayed on the top of the status message stack. Status messages are used to
inform of:
• status of a specific system that has been manually or automatically activated/
deactivated
• low-priority system failures
Takeoff Configuration Warning
The Takeoff Configuration Warnings are armed on the ground when both engines
accelerate as a result of thrust levers being advanced above 70% N1. A voice warning,
an EICAS warning message and flashing red Master Warning annunciators are
provided for any of the following conditions:
All TOC warnings are canceled when the configuration error is corrected.
Inhibited EICAS Caution Messages
During takeoff and landing, the DCU logic inhibits distracting EICAS caution
　
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