CHAPTER 1
PLANNED MAINTENANCE SYSTEM
AND FAULT ISOLATION
LEARNING OBJECTIVES
Upon completing this chapter, you should be able to do the
following:
1. Describe the purpose of maintenance systems.
2. Describe the methods used in identifying system faults.
INTRODUCTION
The increasing complexity of our equipments
requires a viable maintenance program to ensure that
the systems perform in a manner that will ensure max-
imum operational readiness. To overcome this prob-
lem, the Navy has developed an excellent preventive
maintenance system—the Ships’ Maintenance and
Material Management (3-M) System. This system
provides a standard means for planning, scheduling,
controlling, and performing planned maintenance on
all equipment.
It is not uncommon for a Fire Controlman Second
Class to be in the position of a work-center super-
visor. As such, you will need a broader knowledge of
a variety of subjects to perform your duties in a pro-
fessional manner. One area you cannot take lightly is
maintenance. Your fire-control system is kept at its
maximum level of readiness through maintenance. To
help you in this area, this chapter briefly discusses the
Planned Maintenance System (PMS) and fault-isola-
tion procedures.
The information provided in this chapter is not
intended to cover all aspects of the 3-M System. For
more in-depth information on this system, refer to the
Ships’ Maintenance and Material Management (3-M)
Manual, OPNAVINST 4790.4.
PLANNED MAINTENANCE SYSTEM
The Planned Maintenance System (PMS) provides
a standard means for planning, scheduling, control-
ling, and performing planned maintenance to complex
mechanical, electrical, and electronic equipments.
PMS maintenance actions are the minimum required
to maintain equipment in a fully operable condition
and within specifications. The PMS includes a Main-
tenance Data System (MDS), which is used to record
important scheduled and corrective maintenance
information, and electronic data-processing capa-
bilities, which are used to retrieve this information for
maintenance analysis. The 3-M Manual establishes
the PMS and assigns PMS management responsi-
bilities.
The PMS provides regularly scheduled tests to
detect degraded performance and to aid in preventing
failures during tactical operations. When failures do
occur, the PMS provides formal corrective mainte-
nance in step-by-step fault-isolation and repair proce-
dures. Complete technical documentation (including
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