MIL-M-81273/1A(WP)
or a combination thereof showing
an understanding of the physical
.
electrical, mechanical, and hydraulic
characteristics of the components
functional relationships. Schematics
and how they achieve their functions.
The test set descriptions present a
and block diagrams may need to be
qualified by appropriate tabular data.
brief coverage to familiarize the as-
Illustrations showing the overrall
sembly and test personnel with these
chain of operational phases may
items.
prove also to be advantageous. An
example of suck an illustration would
3.3.2.2 Scope and Depth. The
be a missile flight profile or the se-
physical description expands upon
quence of events in a drill mine oper-
the basic equipment layout and
ation which is presented as Figure
physical characteristic: given in
3-6. "Black box" treatment of com-
the introductory portion of the
ponents is preferred to a detailed
manual. Interest is concentrated
approach at the system level; that is,
upon basic components of the equip-
discussion of component operations
ment; for complex equipment, con-
must indicate the result of the com-
sideration may also be necessary for
ponent operations rather than the
various subsystems. The descrip-
reamer in which the result is achiev-
tion of each component shall tell in
ed. Coverage of the manner of oper-
terms of its function what the com-
ation is reserved for the physical de-
ponent is, where it's physically
scription of the component.
located in the equipment, how it per-
forms its function, and of what the
3.3.1.5.3 Sub-Systems Operations.
component consists. The descrip-
For complex equipment, the overall
tion should contain a coverage of the
description may need to be supple-
component's parts and how they per-
form their function. In the test set
mented with discussions of sub-
systems operations and /or major
descriptions, each test set descrip-
components; however, for simple
tion as a whole shall provide no more
coverage than that given to a moder-
equipment, a discussion of the overall
sequence of operations may be suf-
ately complex component.
ficient. Sub-systems that might be
3.3.2.3 Approach. The physical.
discussed would be electrical,
hydraulic, and mechanical; major
description is a reference section;
components might be firing mecha-
that is, it is primarily a compilation
nisms and control boxes. Supporting
of component descriptions each of
material such as mechanical or
which is gene rally complete within
itself. Three basic approaches
hydraulic diagrams or simplified
schematics may be utilized.
toward organization of the component
descriptions exist; they include ar-
3.3.2 Physical Description. The
rangement by alphabetical listing
following paragraphs enumerate the
of components, by physical location
requirements for preparation of
of components, and by functional
physical descriptions.
position of the components within
the equipment or system thereof.
3.3.2.1 Purpose. This portion of
3.3.2.4 Audience Consideration.
the manual shall contain the physical
descriptions of the equipment a-rid a
The physical description is usually
brief description of the applicable
slanted toward the maintenance tech-
test sets. The equipment descrip-
nician. Consequently, the descriptive
tions are intended to give the reader
material should complement the
5
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