MIL-DTL-24784/17B(SH)
3.6.6.4.2 Detailed (second) level of functional description. The detailed-level description shall
explain the system major functions in terms directly related to the diagrams in Chapter 7. Data
and control functions shall be described down to the level of an equipment or an equipment
group. Functional descriptions of important parts of electrical or mechanical systems may be
supported by illustrations similar to figure 17-10.
3.6.7 Chapter 6, Scheduled maintenance. Chapter 6 shall contain all system schedule test
procedures, together with necessary explanations and illustrations. It is intended that the
engineering effort required to develop preventive maintenance data be expended only once and
that the data, where applicable be used both in this chapter and in Logistic Support Analysis
(LSA) or Maintenance Requirements Cards (MRC) where one or more of the latter three data
items are required by the contract (see 6.2). The preparation of this chapter of the manual should
therefore be delayed until completion of the LSA, or MRC; submissions of the manual draft copy
for review should be marked "TO BE SUPPLIED UPON COMPLETION OF LSA". When the
approved LSA, or MRC data is available, it shall be referenced in the manual. When included in
the manual, such LSA, or MRC data shall be integrated with other technical data required by this
specification to be in this chapter. These procedures shall be correlated with the installation
checkout requirements of 3.6.10.6, so that any maintenance or performance test procedure also
required for checkout may be properly referenced from Chapter 9, Installation data. The
installation standards summary sheet (see 3.6.10.9.2) shall also include space for any maintenance
or performance test result that should be recorded by the installer. The recorded information shall
provide a reference to the Navy technician when troubleshooting or when needed for installation
acceptance certification. Chapter 6 shall comprise the following:
a. Introduction.
b. Scheduled maintenance action index.
c. Scheduled test procedures.
3.6.7.1 Introduction. The introduction shall be an explanation of the purpose, scope, and
arrangement of the scheduled maintenance material. When a preventive maintenance procedure is
critical to the operation of the system and the schedule for servicing is absolute (not
recommended), this information shall be conspicuously written as a CAUTION. The following
statement shall be included:
"The scheduled maintenance instructions in this manual are intended to duplicate those
furnished in the Planned Maintenance System (PMS). In case of conflicts, the PMS
documentation takes precedence. Such conflicts should be reported immediately on the
user comment sheet in accordance with the maintenance procedures for this manual."
3.6.7.2 Scheduled maintenance action index. This index shall include all scheduled performance
procedures. The index shall be tests and preventive maintenance tabulated as follows:
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