in ASD S1000D.
This concept identifies the Chapters and Sub-Chapters into which the data has to be organized,
and hence provides values for the first three characters of the Catalogue Sequence Number
(CSN).
The subdivision of these Sub-Chapters into Sub-Sub-Chapters, Units and Figures, in order to
establish values for the remaining characters of the CSN, is undertaken with special regard to the
particular content of each Sub-Chapter and to the effective pictorial representation of the Figures,
given by relevant Illustrations.
Numerical Figure Numbers have been allocated sequentially, starting from 01.
The range of Figure Numbers is allocated within the same Chapter, Sub-Chapter,
Sub-Sub-Chapter and Unit; when a change to this first six characters of the CSN is encountered, a
new Figure Number range, starting with 01, begins.
The data elements relative to the items of an assembly are organized in Figures, which are
supported with the appropriate illustrations.
Each illustration Sheet has its own Illustration Control Number (ICN).
The layout of the spare parts illustrations has been arranged according to the sequence of the
breakdown operations of sub-assemblies from main assemblies, up to the details of the single
components.
The indenture system used in the detailed part list shows the relationship of parts and assemblies
to next higher assemblies or installations in assembly order as follows:
INSTALLATION
but not illustrated on the accompanying illustration, this is marked with a dash in this column,
and the dash is in the same line as the Item No.
exceeding the available space are split with the overflow in the second line.
The P/Ns relevant to special parts modified by Alenia waiver documents, are identified for
specific Manufacturer Serial Number with the same fixed part of P/N, followed by avariable part
with - 7XX suffix (where XX is a progressive number).
Example: G1235331106-001 (P/N old), G1235331106-701 (P/N new).
Example: G1235331106-M(or -N, or -P)-xx/002/xxxxxxx.
Location. Additionally supplementary information, which relates to the part and its location, could
also appear.