R 1EFF : 001-049, 051-061, 101-105, 1 31-32-00Page 2 1 1 May 01/05 1 1 1CES 1

 CFDS - Component Location
 Figure 001A

R 1EFF : 062-099, 106-149, 151-199, 201-299, 1 31-32-00Page 3 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1R **ON A/C ALL

 B. Levels of Maintenance The failure information delivered by the Centralized Fault Display System (CFDS) corresponds to several levels of maintenance.
 (1)
 Line maintenance This maintenance is characterized by rapid intervention of maintenance personnel in a short time period; it is limited to the isolation and replacement of a faulty equipment. This action consists of the identification and/or confirmation of fault condition(s), the isolation of the fault and the replacement of the faulty unit (i.e the Line Replaceable Unit (LRU)). A test is carried out before and after the removal/installation procedure to check the correct operation of the system.

 (2)
 Hangar or main base maintenance This maintenance is characterized by intervention of maintenance personnel in a longer time period and generally concerns actions that cannot be performed at line maintenance level, either because the procedures are too lengthy or because more skilled personnel are required.

 (3)
 Workshop maintenance These maintenance actions are performed at regular intervals (check A, 2A, B...). Intervention of maintenance personnel is then scheduled according to aircraft utilization and concerns the items of equipment for which some mechanical parts are not monitored and/or tested. These failures are called hidden failures.

 1EFF : ALL 1 31-32-00Page 4 1 1 Feb 01/99 1 1 1CES 1

 2. Component Location
__________________
 **ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
 (Ref. Fig. 002)

R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
 (Ref. Fig. 002A)
 **ON A/C ALL
 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------1TW CFDIU 87VU 127 824 31-32-34
 1EFF : ALL 1 31-32-00Page 5 1 1 Aug 01/05 1 1 1CES 1

 CFDS - CFDIU Location
 Figure 002

R 1EFF : 001-049, 051-099, 101-105, 151-154, 1 31-32-00Page 6 1201-207, 1May 01/05 1 1 1CES 1

 CFDS - CFDIU Location
 Figure 002A

R 1EFF : 106-149, 155-199, 208-299, 301-399, 1 31-32-00Page 7 1401-499, 1Aug 01/05 1 1 1CES 1

 3. System Description
__________________
 A. System Architecture
 **ON A/C 001-049, 051-061, 101-105,
 (Ref. Fig. 003)

R **ON A/C 062-099, 106-149, 151-199, 201-299, 301-399, 401-499,
 (Ref. Fig. 003A)
 **ON A/C ALL
 The CFDS is made up of the following components :
 (1)
 The BITEs of the systems : The BITE is an electronic device (hard + soft) located inside each electrical or electronic system of the aircraft. The main functions of the BITE are to detect, locate and store the faults of the system.

 (2)
 The CFDIU : This computer is connected to the BITE of the electronic systems of the aircraft and receives the fault data from these systems. Moreover, the flight warning computer 1 or 2 (FWC), the flight augmentation computer 1 (FAC1), the clock, the flight data interface unit (FDIU) and the display management computer 1,2 or 3 (DMC) are used in the basic definition to deliver general parameters.

 (3)
 The MCDUs :

 **ON A/C 001-003, 051-053,
 (Ref. Fig. 004)
R **ON A/C 004-049, 054-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 (Ref. Fig. 004A)
 1EFF : ALL 1 31-32-00Page 8 1 1 Aug 01/05 1 1 1CES 1

 CFDS - Block Diagram Figure 003 
R 1EFF : 1 1 1CES  001-049, 051-061, 101-105,  1 111 31-32-00 Page 9 May 01/05

 CFDS - Block Diagram
 Figure 003A

R 1EFF : 062-099, 106-149, 151-199, 201-299, 1 31-32-00Page 10 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1

 CFDS - Multipurpose Control and Display Unit (MCDU)
 Figure 004

R 1EFF : 001-003, 051-053, 1 31-32-00Page 11 1 1 May 01/05 1 1 1CES 1

 CFDS - Multipurpose Control and Display Unit (MCDU)
 Figure 004A

R 1EFF : 004-049, 054-099, 101-149, 151-199, 1 31-32-00Page 12 1201-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1 **ON A/C ALL

 The MCDU consists of a screen used for the display of data, an alphanumerical keyboard and lines keys for sending commands to the systems that are connected to it:
 -FMGC (Flight Management function)
 -DATA LINK (ACARS) (optional)
　
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