Gulfstream Aerospace G550, Руководство по эксплуатации, Страница: 24 / 62

ASCB-D Interface Protocol
Visual Guidance System VGS
B. DEOS Software Helper Application:
The DEOS software application is separate from the CMC. It enables the
CMC to compile maintenance data in functional groupings, and, since the
software is hosted in a processor module residing on an emergency
(battery-powered) bus, record events such as APU and/or engine start or
shutdown data that would elude the CMC until the aircraft is fully powered.
DEOS enables the following functions:
•
Tracks engine data (start temperatures, time at high power settings
such as max continuous or take-off power, periods of low oil
pressure, accumulated time for specified maintenance conditions,
etc.) that have time constraints for dispatch purposes.
•
Captures faults while on battery power that are unavailable to the
CMC
•
Sorts and filters engine FADEC information to aid in troubleshooting
C. Remote Terminal:
The face of the CMC module features two D-sub connectors to
accommodate a portable (laptop) personal computer via ethernet
connection. Each aircraft comes equipped with a laptop programmed with
the necessary Honeywell developed remote terminal software to enable
maintenance troubleshooting, data downloads, software updates and
component (system member) configuration. The dual connectors on the
module face enable both a laptop and a printer to interface with the CMC
module.
The remote terminal also allows access via the CMC to maintenance
information stored in the database module on MAU #1. The database can
be loaded with a complete aircraft maintenance manual, diagnostic
software, Line Replaceable Unit (LRU) specifications and serial numbers,
fault histories, and other maintenance related information.
D. Loadable Diagnostic Information (LDI) Database:
The loadable diagnostic information database contains a model of aircraft
systems compiled by the interface with all system members (aircraft
components and subsystems) over ASCB-D and ARINC-429 buses. The
database contains information such as subsystem and component
specifications, diagnostic tests, and maintenance messages. The database
is loaded and modified through the remote terminal and allows the
maintenance function to evolve, staying abreast of system changes that
occur in the development and operation of the aircraft.
3. Controls and Indications:
A. Circuit Breakers (CBs):
Circuit Breaker Name: CB Panel: Location: Power Source:
CMC SHUTDOWN PWR LEER H-6 L EMER PWR BATT PACK
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS
2A-31-00
Page 24
July 15/04
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