MIL-DTL-24784-3 Combat System Technical Operations Manual \(Cstom\) Requirements \(See Notice 2 For Replacement Information\)This specification sets forth the Naval Sea Systems Command requirements for the content, general style, and format of Combat System Technical Operations Manuals \(CSTOM\) \(see 6.2\) required for maintaining own-ship combat system \(see 6.3.3\) readiness. CSTOM provides operational forces and school commands with combat system level information concerning design, detailed inter-subsystem interface data, testing, maintenance, and capabilities in fleet user-oriented language and format. The CSTOM documents functional integration of all combat subsystems \(see 6.3.2\) in performance of the major combat system operational functions of detection and entry, tracking and identification, threat evaluation and threat-to-weapon pairing, and engagement and engagement assessment.

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MIL-DTL-24784/3B (SH)

3.9.1.7 Bibliography This section shall provide a list of documents used in preparing this

chapter.

3.9.2 Chapter 6 - Fault detection and impact evaluation. Chapter 6 shall describe methods of

detecting material and personnel faults encountered during testing and operation and shall provide

guidance to the SERT in evaluating the impact of detected faults on combat system readiness.

The purpose of this chapter is to support the SERT in carrying out their corrective maintenance

management responsibilities of coordinating fault isolation efforts and discerning impact

evaluation.

3.9.2.1 Introduction to fault detection and impact evaluation. This section shall explain the use

of impact evaluation tables and operational fault directories provided in Chapter 6. The

relationship of fault detection to readiness assessment shall be stressed. Primary topics shall cover

the fault detection role in readiness assessment.

3.9.2.2 Operational fault directories. This section shall include operational fault directories for

faults observed during combat system operation. Operational fault directories shall identify

hardware and software fault isolation tools employed with each subsystem to isolate operationally

related fault symptoms. Operational fault directories for each mission and major combat system

functions shall be provided. Faults occurring as a result of loss or degradation of inter-subsystem

functions and parameters shall be provided. A narrative shall explain the role of operational fault

directories in the combat system maintenance concept (see 6.3.6). See figure 3-24 for a typical

presentation format.

3.9.2.3 Impact evaluation. This section shall provide SERT with the criteria required to

determine the impact of specific faults on combat system capabilities. A table, similar to figure 3-

25, shall list equipment functions and the impact the loss of these functions will have on specific

combat system missions. Primary topics of combat system degradation, trade-off considerations,

restoration time, fault isolation constraints, and alternative combat system configurations shall be

related.

3.9.2.4 Bibliography This section shall provide a list of documents used in preparing this

chapter.

3.9.3 Chapter 7 - Fault isolation. Chapter 7 shall identify and describe fault isolation tools and

procedures, and their effective use. Interface data for subsystem-to-subsystem functions shall be

provided.

3.9.3.1 Introduction to fault isolation. This section shall introduce and describe a typical fault

isolation pictorial and its associated table of interface references. The table of interface

references, similar to figure 3-26, shall be described. The use of a typical fault isolation pictorial,

similar to figure 3-27, for diagnosing combat system faults shall be explained in detail. When

assembled in CSTOM, the table of interface references shall immediately precede its associated

test and fault isolation pictorial, so that the tabulation can be referred to while viewing the test

and fault isolation pictorial, which will normally be a fold-out.