MIL-DTL-81929C(AS)
source of spares, repair parts, and support equipment and the levels of maintenance
authorized to maintain, repair, overhaul, or condemn them.
3.3.1.1 Relationship between the IPB and the maintenance concept. The IPB is an integral
part of the technical manual data to be prepared in support of maintenance tasks. Therefore, it is
essential that the maintenance concept is followed in the development of the supporting IPB.
Emphasis should be placed on the accessibility of data, comprehensibility of supporting
illustrations, and the use of the information presented. The IPB should be prepared as an integral
part of the maintenance coverage.
3.3.1.2 Preparation of the IPB. The source data used for maintenance task development shall
also be used for development of the IPB. That is, if the maintenance tasks were developed
through the LSA, the same set of documents shall be used in the development of the IPB.
Consistency of information contained in the maintenance coverage and the IPB is essential.
3.3.1.3 Development of the IPB GAPL. The assembly of data should follow the same pattern
established in the development of the maintenance task. Once the task analysis has been
completed and the outline of the manual has been approved, the properly prepared GAPL will
track the maintenance tasks it is intended to support. If a discrepancy between the maintenance
task and the supporting GAPL is uncovered, the source data used shall again be reviewed and a
determination made of the cause of the conflict. It should not be automatically assumed that the
GAPL or the maintenance information is incorrect and adjust one to meet the other.
3.3.1.4 Top-down breakdown (engineering drawing sequence). Basic top-down breakdown
sequence should not be used in the development of the IPB data, unless it matches the
maintenance task to be supported.
3.3.2 Illustrations required. IPB figures may contain many different types of illustrations (see
3.4.2). The number and types of illustrations required will depend on the complexity of the
item(s) covered.
3.3.2.1 Division of data. The technical content shall be divided into figures. Division shall be
by representative main groups, assemblies, or systems with such additions, omissions, or change
as may be required by the specific end item. The main groups or systems selected shall be
compatible with the approved logistic support analysis (LSA), maintenance plan, or other
approved forms of maintenance rationale. The first figure shall contain an assembled view of the
end item. This view shall be keyed to permit reference to detailed views and figures as required.
Systems and subsystems shall be separately illustrated and keyed to the assembly figures that list
and illustrate the detailed parts of the system or subsystem. These illustrations shall be indexed so
that the separate assembly sections can be readily located in the GAPL.
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