-Fault identification (procedure title)
-1. Possible Causes
-2. Job Set-up Information
-3. Fault Confirmation
-4. Fault Isolation
-5. Close-up.
The contents of these is as follows:
(a) Possible Causes This lists all the suspect items which are replaced or checked during the procedure. The list is given to enable the collection of all items required to correct the fault and not for "shot-gun" trouble shooting. This form of trouble shooting is not recommended. The list does not give details of wiring to be checked. This is detailed in the procedure and only mentioned in the list (eg: aircraft wiring).
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(b)
Job Set-up Information This lists any tools, equipment and procedures required to be carried out before commencing the fault isolation and is the same as the AMM job set-up.
(c)
Fault Confirmation Any test procedure needed to confirm that the fault is genuine is given here. This is to avoid unjustified LRU removals. Confirmation tests of spurious warnings will also be covered, if applicable.
(d)
Fault Isolation Procedure The procedure gives the appropriate actions to isolate and correct the related fault symptom. Wiring checks are given where necessary. These give values (eg. resistance), connector and pin numbers where appropriate.
R When not specified, a wiring check must include continuity and R insulation test.
(e) Close-up If it is necessary after fault confirmation or fault isolation to return the A/C to its initial configuration, a procedure is given.
(6) Task Supporting Data (P. Block 301)
Task Supporting Data are given to show the system layout and interconnections with other systems.
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CES R Example Fault Isolation Procedure R Figure 004 (SHEET 1)
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R Example Fault Isolation Procedure R Figure 004 (SHEET 2)
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G. Breakdown and Page Numbering
(1) Breakdown
The TSM is divided into chapters to provide a functional breakdown of
systems in accordance with the Air Transport Association (ATA)
Specification 100.
Each chapter is sub-divided into sections which are identified by a
six digit number made up of three elements:
----------------------- 2ND ELEMENT
|
|
1ST ELEMENT ------- | ----------- 3RD ELEMENT
| | |
--- --- ---
XX XX OO
--- --- ---
| | |
CHAPTER/ ------- | ------------ SUBJECT/UNIT
SYSTEM |
|
SECTION/ -----------------
SUBSYSTEM
Each standard chapter takes its 1st element number from these ATA
groups:
AIRFRAME SYSTEMS (21 - 38, 49, 52)
STRUCTURE (53, 57)
POWER PLANT (70 - 80)
The chapters are separated by tab dividers to ease location of information.
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(2) Page numbering
The numbering and breakdown level of the TSM pages is as follows: --------------------------------------------------------------------
| SUBJECT | LEVEL | PAGES |
| |-----------------------| |
| ----------------------- | ----- MAN ------ CH ------ CH-SE --------- | --------------- |----
|FRONT MATTER |
| |
|Registration Card X |
|Title Page X |
|Record of Revisions X |
|List of Temporary Revisions X 1 to 99 |
|List of SBs x 1 to 99 |
|List of COCs X 1 to 99 |
|List of Chapters X 1 to 99 |
| |
|Index of Warnings/ X 1 to 99 |
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