B. Crew Alerting Systems (CAS) Messages:
CAS messages associated with the central maintenance computer system
are:
Area Monitored:
CAS Message:
Message Color:
Configuration Management
System
CMS 1-2 Fail
Amber
Software Configuration
System Config Fail
Amber
Software Configuration
Validate Configuration
Amber
Active Faults Being Recorded by
CMC
Check CMC
Blue
Configuration Management
System
CMS 1 (or) 2 Fail
Blue
FDR/CMC EVENT Switch
Event Record
Blue
ASCB-D, ARINC-429 Discretes
Exceedance Record
Blue
CMC
CMC Fail
Blue
4. Limitations:
There are no limitations associated with the Central Maintenance Computer as of
this writing.
2A-31-70: Monitor and Warning System
1. General Description:
The monitor and warning system (MWS) for the Gulfstream G550 is a software
function residing in two processor modules: one in Modular Avionics Unit (MAU) 1
and the other in MAU 2. To preserve previously established naming conventions,
the MWS is termed the Fault Warning Computer (FWC) and labelled as such on
the SENSOR menu of the Display Controller (DC). Normally the on-side FWC is
the active system, however in event of a malfunction, selection of the alternate
system is possible on the DC menu.
All monitored components, systems and subsystems are directly linked to the
processor modules through the ASCB-D bus or indirectly through Input / Output
(I/O) modules communicating over ARINC-429 busses. Thresholds for initiation of
Warning, Caution and Advisory notifications over the crew alerting system (CAS)
are software programmable and are set as part of the aircraft configuration model
compiled by the ASCB-D bus. System and subsystem function CAS thresholds
may be software determined or set by position information from hardware units
(e.g. weight-on-wheels switches, ground spoiler position, etc.)
If a CAS threshold is exceeded, the MWS prompts the display of the appropriate
text message on the cockpit Display Unit (DU) configured for CAS messages. The
messages are displayed in red, amber or blue text appropriate to the urgency of
the malfunction and arranged chronologically with the most recent message at the
top of the category.
•
Red text for warnings indicating a condition that may result in injury or loss
of life
•
Amber text for cautions indicating a condition that result in damage to or
loss of equipment
•
Blue text for advisories indicating a condition degraded from normal
operational specifications
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS
2A-31-00
Page 25
July 15/04
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