D I R E C T SUPPORT (INTERMEDIATE) MAINTENANCE INSTRUCTIONS
Section I. GENERAL
use following isolation of a J-SIIDS malfunction to
the grid wire sensor. However, the performance
This chapter provides specific instructions for all
standards contained in section V may be used at
maintenance functions authorized direct support
periodic intervals to check the ability of the grid wire
maintenance personnel by the maintenance alloca-
sensor to perform its intended mission.
tion chart (app B). Included is a description of
controls used by direct support maintenance per-
5-3. Direct Support Controls
sonnel, a list of test equipment required for total
Two pushbutton switches: one mounted under the
maintenance, troubleshooting and repair instruc-
junction box cover and the other mounted to the base
tions, and performance standards.
of the junction box are used by direct support
maintenance personnel. The function of these
switches are described in paragraph 4-2.
These maintenance instructions are primarily for
Section II. TOOLS AND EQUIPMENT
5-4. Standard Tools and
5-5. Special Tools and Equipment
No special tools and equipment are required for
Table 2-1 lists standard tools and test equipment
direct support maintenance of the grid wire sensor.
required at direct support maintenance level.
Section III. TROUBLESHOOTING
5-6. Visual Inspection
box at direct support level requires no special
procedures. The grid wire sensor schematic diagram,
Before troubleshooting the grid wire network and
figure 4-1, shows sufficient test points to check
junction box, make a thorough visual inspection.
Check wiring insulation and components for evi-
The volt/ohmmeter listed in table 2-1 is recom-
dence of failure. Check interior for presence of
mended for making these checks. The location of
moisture and other foreign matter.
components is illustrated in figure Cl.
Troubleshooting the grid wire network and junction
Section IV. MAINTENANCE OF GRID WIRE SENSOR
repair facility. On site repair will normally consist of
replacement of defective components only.
a. This section contains instructions for corrective
5-9. General Maintenance Instruction
maintenance of the grid wire sensor. The extent of
maintenance to be performed by direct support
a. In-Process Inspection. During repair, inspect
personnel is governed by the maintenance allocation
parts for defects not visible when the unit is
assembled. Continue the inspection during assembly
to assure that parts are properly assembled. During
b, Repair of the grid sire sensor will be limited to
- the repair process, inspect the grid wire sensor for
components located in the junction box and will be
performed either at the installation site or at the