MIL-DTL-24784/20B (SH)
availability, location, and use of MAMs and redundant swappable components in use within the
system.
3.6.6.8 System FCDs. FCDs shall be the most detailed part of the system of diagrams used to
depict the functional divisions of the system. The FCDs shall be directly linked to the lowest level
of FBDs contained in Chapter 3. This reference shall be by the hardware reference designator.
More information about the FBD and FCD structure and relationship is discussed in 3.5.1.1 and
3.5.1.3 and shown on figure 20-1.
3.6.7 Chapter 6, Alignment procedures. Chapter 6 shall present the corrective adjustment
procedures and support information necessary to restore electrical and mechanical alignment
between the various system equipments. All values and tolerances shall be included. The
alignment shall be cross-referenced to respective fault-isolation procedures and diagrams in
Chapter 5. Alignment procedures shall include references to equipment publications where
further procedures are required at the equipment level. The alignment procedures shall be
presented in step-by-step form.
3.6.8 Chapter 7, System cabling. This chapter shall provide system cabling diagrams, listings
and description tables which will support troubleshooting of the system and the interfaces to
associated systems. Chapter 7 shall be structured to provide coverage for every class of ship for
which the system configuration being covered by this manual is applicable.
3.6.8.1 System cabling diagram. The system cabling diagram shall illustrate the electrical
interfaces between the system units and the interfaces between the system and other associated
systems.
3.6.8.2 System interface listing. The system interface listing shall list all the system cables, by
cable number, and provide a cross-reference to a cable description table which describes the cable.
The listing shall also correlate the cable number with the cable drawing number and show which
ship class(es) the cable is applicable to.
3.6.8.3 Cable description table. The cable description table shall define the electrical interfaces
between units of the system and between the system and associated systems. A separate table
shall be provided for each cable. The cable description table shall be in accordance with the
following.
3.6.8.3.1 Header data. The first line of header data (the table title) contains the table number
and system cable number. The second line (USABLE ON CODE) shall list a code which can be
correlated with the class(es) of ship the cable is installed on. The third and fourth lines list the
names of the units connected by the cable and correlate by physical position with the TO and
FROM columns.
3.6.8.3.2 WXP1, EXP2, From and to columns. The headings of these columns shall show the
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