MIL-DTL-81929C(AS)
3.4.1.8.4 Indexing assemblies. Each assembly and subassembly of the end item shall be
shown assembled and assigned an index number (see 3.4.1.8.1). Assemblies and subassemblies
coded for assembly, manufacture, or repair at the applicable maintenance level shall also be shown
exploded in a detail view on the main illustration or in a separate illustration, and index numbers
shall be assigned to all detailed parts.
3.4.1.8.5 Items not having a logical maintenance sequence. For items not having a logical
maintenance sequence (e.g., circuit card assembly), the assignment of index numbers shall begin at
the top left-hand corner and continue clockwise.
3.4.1.9 Component boards. When a component board or bracket assembly that holds
electrical components is presented orthographically, the reference designation may be placed
within the view of the part, if space permits. Leader lines may be used to identify reference
designations that cannot be placed within the view of the part. When the number of leader lines
to indexed parts causes the illustration to become cluttered, the figure may contain a legend
adjacent to the artwork or on a separate sheet. The listing shall contain an alphanumerical listing
of the reference designations and their associated index numbers. Index numbers for items with
reference designations shall be identified using the legend and not on the artwork. Index numbers
shall be used only to identify items that do not have reference designations.
3.4.1.10 Polarity identification. When applicable, the polarity of electronic components shall
be identified on the component in all maintenance and IPB illustrations.
3.4.2 Detailed artwork requirements.
3.4.2.1 End item illustration. The view of the end item shall be prepared to permit reference
to detailed views, figures, or manuals. Reference shall be made by use of index numbers. The
location of subassembly detailed figures shall be identified by text reference in the GAPL.
3.4.2.1.1 Multiple view illustrations. When it is necessary to identify significant features of
the end item, a multiple view illustration shall be developed in accordance with
MIL-DTL-81927. The multiple view illustration shall be prepared to improve the identification of
the parts or to clarify the relationship or the location of the parts, e.g., effectivity differences or
top, bottom, front and/or back views of an end item or assembly.
3.4.2.1.2 Foldout illustrations. When it is necessary to provide coverage of complex
installations with a single IPB figure, a foldout illustration may be used, e.g., aircraft equipment
rack, or operator's station, with maintenance interaction (i.e., removal or relocation of one
assembly to access another assembly or repair part). A foldout illustration may also be used
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