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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 3/10
FCOM 19 AUG 10
ARCHITECTURE
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 4/10
FCOM 19 AUG 10
ARCHITECTURE
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 5/10
FCOM 19 AUG 10
ARCHITECTURE
Applicable to: ,
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 6/10
FCOM 19 AUG 10
FAILURE CLASSIFICATION
Applicable to: ALL
There are three classes of failure :
Class 1 : Failures indicated to the flight crew by means of a flight deck effect (e.g. ECAM or
instrument flags).
Class 2 : Failures which can be left uncorrected until the next scheduled maintenance check
(with a maximum delay of 600 FH).
Class 3 : Failures not indicated to the flight crew, with no fixed time quoted for correction.
Failure Classes Class 1 Class 2 Class 3
Operational
consequences
YES NO NO
Indication to the flight
crew
YES
Automatically displayed in real
time :
‐ Warning or caution
messages on Engine
Warning Display
‐ Flags on Primary Flight
Display or Navigation
Display, or System Display,
‐ Local warning
YES
STATUS flashing at the end of
the flight :
‐ Maintenance Status
messages on SD
NO
Dispatch consequences Refer to MEL may be :
”GO”
”GO IF”
”NO GO”
MEL not applicable.
“GO” without conditions.
Corrections can be deferred for
600 flight hours.
MEL not applicable.
No fixed time quoted for
corrections.
However, correction is
recommended to improve
dispatch reliability.
Indication to the
maintenance team
YES
Automatically print out at the end of each flight :
Failure messages on the CMC Post Flight Report
YES
On request, when needed,
Failure messages on CMC
Class 3 Report.
Note: Most Class 1 failures have an operational consequence on the current flight. Some Class
1 failures, such as MINOR FAULT, have no operational consequence on the current flight,
but must be corrected in accordance with the MEL preamble, or the time specified in the
associated dispatch condition of the MEL.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 7/10
FCOM 19 AUG 10
CMS FUNCTIONS
Applicable to:
The main CMS functions are the :
Acquisition and storage of messages transmitted by the connected system ‐ BITEs, or by the Flight
Warning Computer (Warning / Caution titles).
‐ Elaboration of the maintenance phases.
‐ Elaboration of the maintenance reports :
• POST OR CURRENT FLIGHT REPORT :
Presents all ECAM warning/caution and failure messages (Class 1 and 2 failures) recorded
during the last or current flight leg.
Available in flight and on ground.
• PREVIOUS FLIGHT REPORT :
Presents all ECAM and failure messages recorded during the 63 previous flight legs (post flight
reports).
Available on ground only.
• AVIONICS STATUS :
Presents, in real time, the systems affected by a failure.
Available in flight and on ground.
• CLASS 3 REPORT :
Presents the Class 3 failure messages detected during the last flight leg.
Available on ground only.
• SYSTEM REPORT/TEST :
Allows interactive dialogue between any system and the MCDU.
Available on ground only.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
MAINTENANCE SYSTEM
DESCRIPTION
A330/A340 FLEET DSC-45-10 P 8/10
FCOM 19 AUG 10
CMS FUNCTIONS
Applicable to: ,
The main CMS functions are the :
Acquisition and storage of messages transmitted by the connected system ‐ BITEs, or by the Flight
Warning Computer (Warning / Caution titles).
‐ Elaboration of the maintenance phases.
‐ Elaboration of the maintenance reports :
• POST OR CURRENT FLIGHT REPORT :
Presents all ECAM warning/caution and failure messages (Class 1 and 2 failures) recorded
during the last or current flight leg.
Available in flight and on ground.
• PREVIOUS FLIGHT REPORT :
Presents all ECAM and failure messages recorded during the 63 previous flight legs (post flight
　
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