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COCKPIT / CMS INTERFACE......................................................................................................................... 9/10
DSC-45-20 SYSTEM OPERATION
MAINTENANCE MENU.....................................................................................................................................1/22
POST OR CURRENT FLIGHT REPORT........................................................................................................... 4/22
PREVIOUS FLIGHT REPORT..........................................................................................................................8/22
AVIONICS STATUS........................................................................................................................................10/22
CLASS 3 REPORT......................................................................................................................................... 12/22
SYSTEM REPORT / TEST.............................................................................................................................16/22
UTC / DATE INIT............................................................................................................................................19/22
CMC RECONFIGURATION............................................................................................................................ 22/22
DSC-45-30 DATA LOADER
DESCRIPTION.................................................................................................................................................... 1/2
DSC-45-35 PRINTER
DESCRIPTION.................................................................................................................................................... 1/4
CONTROLS AND INDICATORS........................................................................................................................ 3/4
DSC-45-40 ELECTRICAL SUPPLY
BUS EQUIPMENT LIST......................................................................................................................................1/2
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
PRELIMINARY PAGES - TABLE OF CONTENTS
Intentionally left blank
A330/A340 FLEET DSC-45-PLP-TOC P 2/2
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 1/10
FCOM 19 AUG 10
GENERAL
Applicable to: ALL
The purpose of the Central Maintenance System (CMS) is to ease the maintenance task by directly
indicating, in the cockpit, the fault messages and allowing some specific tests.
Two levels of maintenance are possible :
At the line stop : Equipment removal
At the main base : Troubleshooting
COMPONENTS
Applicable to:
The CMS includes :
The Built In Test Equipment ‐ (BITE) of all electronic systems
‐ Two fully redundant Central Maintenance Computers (CMCs)
‐ Three MCDUs (Multipurpose Control Display Units) used also for FMGS, ACMS (Aircraft
Condition Monitoring System) and ACARS (if installed) which dialogue with the CMC for display of
information or initiation of tests
‐ One printer (A4 format).
Usually only CMC 1 is used, when CMC 2 is in standby. CMC 2 will automatically take over if CMC 1
fails.
A pushbutton on the overhead panel allows to force the transfer to CMC 2, by setting the CMC 1 to
OFF.
COMPONENTS
Applicable to: ,
The CMS includes :
‐ The Built In Test Equipment (BITE) of all electronic systems
‐ Two fully redundant Central Maintenance Computers (CMCs)
‐ Three MCDUs (Multipurpose Control Display Units) used also for FMGS, ACMS (Aircraft Condition
Monitoring System) and ATSU (Air Traffic Service Unit), which dialogue with the CMC for display
of information or initiation of tests
‐ One printer (A4 format)
Usually only CMC 1 is used, when CMC 2 is in standby. CMC 2 will automatically take over if CMC 1
fails.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 2/10
FCOM 19 AUG 10
A pushbutton on the overhead panel allows to force the transfer to CMC 2, by setting the CMC 1 to
OFF.
MODES OF OPERATION
Applicable to: ALL
The CMS operates in two main modes :
‐ The NORMAL mode or REPORTING mode in flight
‐ The INTERACTIVE mode or MENU mode on ground
In NORMAL mode, the CMS records and displays the failure messages permanently transmitted by
each system BITE.
In INTERACTIVE mode, the CMS enables the connection of any BITE system with the MCDU, in
order to display the maintenance data stored and formated by the system BITE, or to initiate a TEST.
　
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