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*
these two digits are blank when only one maintenance configuration exists
*
when there are several configurations of method, these digits change as follows: 78-31-00-810-801- 01 first configuration 78-31-00-810-801- 02 second configuration 78-31-00-810-801- 03 third configuration
The method/technique configurations have always the same A/C effectivities. The deletion of one configuration does not change the three digit alphanumeric indicator of the remaining task(s).
NOTE: When a trouble shooting operation is completely different according to equipment design (example: Different vendor for a same equipment), the mention "Config." appears at the bottom of the page to differentiate all configurations.
A three digit alphanumeric indicator can be assigned by the airline to highlight unique airline data. ------------------------------------------------------------------------------
N. Warnings, Cautions and Notes
WARNING : CALLS ATTENTION TO USE OF MATERIALS, PROCESSES, METHODS, PROCEDURES OR LIMITS WHICH MUST BE FOLLOWED PRECISELY TO AVOID INJURY OR DEATH TO PERSONS.
CAUTION : CALLS ATTENTION TO METHODS AND PROCEDURES WHICH MUST BE FOLLOWED TO AVOID DAMAGE TO EQUIPMENT.
NOTE : Calls attention to methods which make the job easier or provide supplementary or explanatory information.
EFF : ALL
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CES P. Functional Item Numbers (FIN)
The equipment on the A/C is identified by a unique identifier called a Functional Item Number (FIN). The basic element of the FIN is a two letter code indicating to which system/circuit the equipment belongs. To this code are added prefixes and/or suffixes which provide the unique identification for individual items of equipment.
For electrical equipment (any component with an electrical connection) the FIN is of the form 2CA1 where:
-2 = Second component in circuit CA
-CA = Circuit two letter code
-1 = Suffix - First of several similar systems (System 1)
NOTE : Several identical components which perform the same function in
____ the same circuit can be differentiated by the suffix number. The general rule is that an even suffix identifies a component on the right hand side and an odd suffix identifies a component on the left hand side.
For mechanical equipment the FIN is of the form 3016GM where M =
mechanical equipment and G = corresponding system.
EFF : ALL
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3. Philosophy and Use__________________ The Maintenance concept is based on the use of CFDS and TSM. (Ref. Fig. 005)
NOTE : The aircraft is equipped with a high number of digital items of
____ equipment. In most of the cases, computers may be recovered after an abnormal behaviour or a detected fault, either by a software reset (reset of microprocessor) or by interrupting the power supply of its processing parts for a short time. This is achieved with the normal cockpit controls (engagement levers, pushbutton switches) by selecting the related control off then on or by action on the corresponding circuit breaker.
A. Philosophy
(1)
TSM
The TSM provides coverage of all probable aircraft faults. This includes being a trouble shooting guide to faults monitored and displayed by the aircraft systems. Faults not monitored by the aircraft systems are also covered.
(2)
CFDS
The objective of the CFDS is to provide an economic, efficient and easy-to-use means of maintaining the aircraft systems. To do this the CFDS directly monitors and identifies faulty Line Replaceable Units (LRUs) in the aircraft systems and displays items identified as faulty to the maintenance crew. This is essentially achieved by analysis of all cockpit events which are triggered by the monitoring of the aircraft systems. Refer to paragraph 4 for a description of the CFDS and how to use it. The CFDS also takes into account a major objective of the line maintenance which is to avoid unjustified removals of equipment. For these reasons the CFDS makes a detailed analysis to identify the responsible LRUs; this is also to confirm that the event was actually due to a hardware failure and not an intermittent fault. To achieve its purpose, the CFDS has several major functions which supply:
-A maintenance Post Flight Report (PFR) which is printed at the end of each flight. The PFR (Ref. Para. 4.E.(1)) allows association of ECAM warnings and CFDS maintenance messages.
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