MIL-DTL-24784/3B (SH)
3.9.3.2 Search radar subsystem fault isolation. This section shall describe search radar
subsystem fault isolation tools and their effective use. Descriptions shall encompass such factors
as when and under what circumstances a particular fault isolation tool should be used, and the
degree of reduced capabilities incurred as a result of using a particular fault isolation tool. More
detailed aspects of search radar subsystem fault isolation shall be addressed by referencing
existing fault logic diagrams contained in search radar subsystem technical manuals. A synoptic
description of fault isolation techniques presented in the highest level subsystem technical manual
shall be provided.
3.9.3.3 Additional sections. Additional sections shall be added to describe fault isolation to the
same level in accordance with 3.9.3.2 for the following subsystems, as appropriate:
a.
Tactical data subsystem.
b.
Electronic warfare subsystem.
c.
Gun weapon subsystem.
d.
Underwater weapon subsystem.
e.
Missile weapon subsystem.
f.
Light-airborne multi-purpose (LAMPS) subsystem.
g.
External communication subsystem.
h.
External navigation subsystem.
3.9.3.4 Support subsystem fault isolation. This section shall address fault isolation techniques
for the various systems that comprise the support subsystem. Descriptions shall be to level 2, and
involve only basic methods of fault isolation. Fault isolation material to support this section shall
include system schematics similar to figures 3-28 and 3-29; a figure index, similar to figure 3-30,
showing the applicability of support systems to individual subsystems of the combat system; tables
of fault symptoms and probable causes, similar to figure 3-31; and a table of audiovisual alarms
similar to figure 3-32. The table of audiovisual alarms, in addition to specifying alarm and alarm
sensor locations, shall prescribe action to be taken when the alarms are activated. The action, in
most cases, will involve preliminary checks to verify and assess the abnormal condition, and a
reference to a system publication for detailed fault isolation procedures. The primary topics of
this section shall support, as applicable, fault isolation of the following support subsystem
elements:
a.
Central dry air.
b.
High pressure air.
c.
High pressure nitrogen.
d.
Electronic salt water liquid coolant.
e.
Chilled water liquid coolant.
f.
Air conditioning.
g.
Steam heating.
h.
Salt water firemain.
i.
Anti-icing.
j.
Power distribution.
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