MIL-DTL-24784/20B (SH)
a.
Safety precautions.
b.
A list of tools and test equipment identified by type, manufacturer, and model number.
c.
The title of the test to be performed.
d.
The minimum rating of the technician expected to perform the task.
e.
Preliminary setup data required to perform the test.
f.
Detailed procedures for accomplishing the test. Procedures requiring lengthy and identical
setup data may be presented in detail in one procedure and referenced in succeeding
procedures.
g. Values or conditions, with tolerances, indicative of normal operation.
h. References to troubleshooting or corrective actions to be used if the test values are not within
tolerances.
i. Illustrations to support the test.
3.6.4 Chapter 3, Functional description. Chapter 3 shall describe how the components or
equipments comprising the system jointly perform major operations and functions, and how
associated systems contribute to the performance of these major functions. Equipment or
associated system interfaces shall be described only as necessary to identify the sources or
destinations of system inputs and outputs (see figure 20-33). Descriptions shall not repeat the
functional description provided in the equipment manuals or Chapter 8.
3.6.4.1 Method of presentation. The presentation shall first define how the system major
functions meet the purpose of the system as described in 3.6.2. Each major function shall then be
discussed separately at progressively increasing levels of detail. The description of the entire
system shall be supported by a basic block diagram of the system (see figure 20-34). Where
information can be presented better pictorially than by text, additional diagrams and other
illustrations shall be used. Reference may be made to diagrams appearing in Chapter 5.
3.6.4.2 Introduction. The introduction shall describe the general approach that is used in the
functional description. The introduction shall also describe briefly the interrelationship between
the system and associated systems.
3.6.4.3 System function directory. A system function directory shall tabulate operation control
functions and the signal data described in the detailed level of functional analysis (see 3.6.4.4).
The tabulation shall include the following information, as applicable:
a. Official name of the function, colloquial name, and symbol.
b. Type of control or signal (ac frequency and voltage, dc polarity and voltage, hydraulic
pressure, mechanical motion, synchro, and so forth).
c. The origin and termination of the control or signal.
d. Identify equipments (relay transmitters, coordinate converters, distribution boxes, switches,
and the like) between the origin and termination of the output control or signal.
e. Figure numbers of illustrations on which the function is illustrated, including the fault-isolation
diagrams in Chapter 5.
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