MIL-DTL-24784/18B (SH)
3.6.6.1.1 Sample problem. A sample problem shall be provided for a failure in one of the
replaceable components, and procedural text shall be provided to describe typical use of the
material contained in the fault-isolation portion of the manual. This text shall be supported by
appropriate illustrations, primarily through references to actual diagrams and maintenance
procedures. The same problem shall be presented in an overall illustration of how to use the fault-
isolation material, using excerpts of the material contained in the manual. Figure 18-9 is a typical
example.
3.6.6.2 Supporting maintenance data. This portion shall contain or refer to the data in the
following paragraphs.
3.6.6.2.1 Troubleshooting index. The troubleshooting index shall be presented in tabular form
(see MIL-DTL-24784).
3.6.6.2.2 Maintenance turn-on procedure. Include a maintenance turn-on procedure to energize
the equipment from the fully de-energized condition to full operation (see figure 18-10). This
procedure shall enable the technician to determine which major function (see 6.4.1) or supporting
function is malfunctioning. Each step of the procedure shall include the action to be taken
(STEP), the observation to be made (OBSERVE), and shall assume that normal conditions have
been observed in previous steps. Reference shall be made to the procedure for troubleshooting or
corrective action to be used (REFERENCE) if the observation is out of tolerance. Built-in
monitors such as meters, dials, and lamps shall be used when possible for making observations, as
opposed to the use of external test equipment. The procedure is complete when the equipment is
fully energized and all switches and controls are positioned for proper operation. The
maintenance turn-on procedure may be presented in a troubleshooting dependency diagram.
3.6.6.2.3 Relay coil, switch, and indicator lamp index. A relay coil, switch, and indicator lamp
index shall be prepared in tabular form (see MIL-DTL-24784).
3.6.6.2.4 General troubleshooting information. This portion shall contain general information
and procedures to facilitate use of the diagrams for troubleshooting in accordance with the
approved manual outline. This information may include data that is applicable to all diagrams and
thus need not be repeated in the general notes on each diagram. Examples of such information
may include but not be limited to the following:
a. Method for designating and locating test points
b. Location and identification of parts by reference designations
c. Voltage supply measurements to be performed prior to any troubleshooting or testing.
3.6.6.3 Troubleshooting diagrams. Troubleshooting diagrams (see MIL-DTL-24784) shall be
categorized as Case A and Case B. Case A diagrams comprised of signal flow diagrams, detail
pyramids, summary pyramids, if applicable, ladder diagrams, and power distribution diagrams.
Case B diagrams comprised of high density type signal flow diagrams, summary block diagrams, if
applicable, ladder diagrams, and power distribution diagrams. The diagrams shall provide
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