Crew Alerting System (Cas) Display; Cas Display - Honeywell SPZ-8000 Maintenance Manual

2.
F. Crew Alerting System (CAS) Display
The crew alerting system (Figure 228) is comprised of
the
following
functions:
23 Message Lines Max
. 18 Characters Per Line Max
1 Message Status Line
. CAS Display Declutter Via Scroll Buttons
Master Caution Button Acknowledgement of Messages
CAS Computed Messages
(1) CAS Display - General
The G-IV system is configured with two FC-880 Fault Warning
Computers (FWC) which receive warning, caution, and advisory signals
from various subsystems in the aircraft. Each FWC is performing the
same computations on identical signal inputs. The selection between
which FWC is displayed is accomplished through the DC-884 Display
Controller (Figure 228). This is the crew's means of reversion in
the event of a FWC failure.
The CAS display unit is located positionally under the engine
display. The CAS format comprises the left-hand one-third of the
usable display space. The
color convention and displayed priority
for messages on the CAS display is defined as follows:
RED - Warnings (Top message Stack)
AMBER - Cautions (Middle Message Stack)
BLUE - Advisories (Bottom Message Stack)
. Master Warning/Caution Panel - The main crew interface with the
CAS display is through the warning/caution panel mounted in front
of each pilot on the instrument panel. This panel is shown in
Figure 229. Each annunciator shown is also a push to select
switch. The upper left annunciator/switch is the red
warning/message acknowledgement pushbutton. Below this switch is
the amber warning/message acknowledgement pushbutton. The upper
right button, labeled with amber UP, is the message scroll up
pushbutton. The lower right button, labeled with an amber DN, is
the message scroll down pushbutton. Each annunciator and
pushbutton function will be discussed in later paragraphs.
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Page 277
Aug 15/91
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