The final checks also include removal and stowage
By logical reasoning, you can then eliminate many
of work stands, power vehicles, and other equipment.
of the system's components as possible sources of
Collect, clean, account for, and stow all tools in their
trouble. The trouble may be isolated to a particular
respective places. The last, but very important check to
component that can be replaced instead of blindly
make, is the condition of the working area. Ensure all
exchanging components in hopes of finding the trouble.
loose materials, such as nuts, bolts, washers, bits of
To become a good troubleshooter, you must use the
safety wire, and other articles, are picked up and
various aids that are available. The wiring diagrams,
properly thrown away, and the working area is left in a
functional drawings, and troubleshooting information
clean condition.
contained in the proper equipment manual should be
fully used. This information is especially useful in
NOTE: If an area is left cluttered and dirty after a
checking power distribution and other electrical
job, it becomes a safety hazard to personnel and
circuits throughout the different systems of the
equipment. Personnel may fall, equipment may skid, or
equipment. Voltage and resistance charts are also a
the litter may be picked up and ingested by jet engines.
great aid when isolating a trouble to a particular part or
These engines are especially susceptible to foreign
subassembly. These are but a few of the aids to good
object damage (FOD).
troubleshooting. The ability of a troubleshooter
EQUIPMENT REMOVAL, REPAIR, AND
depends upon his/her abilities in using the tools and
REINSTALLATION
information at hand.
The first logical step after the unit has been
Planning is the most important step in equipment
delivered to the shop, screened, and put into the repair
removal and installation. You should be able to describe
channels is a visual check of the unit. It should be
the steps in planning for equipment removal and
thoroughly inspected for broken leads, parts that are
installation. Planning must include such items as
burned, loose mountings, proper fluid levels, and any
obtaining the proper tools, removing hazards to
other signs of failure. If no visual defects are found,
personnel and equipment, clearing shop space, and
operate the equipment, and observe for any signs of
reinstallations prior to the actual removal. If these
malfunction.
things are considered and plans are made accordingly,
you are more likely to have no lost time, no personnel
In the preliminary check, the experience of the
injuries, and no damaged equipment.
technician is an important factor, and the knowledge
gained from previous difficulties with the equipment
Removal Of Equipment
often serves as a guide in knowing what to expect. The
experienced and the inexperienced technicians can find
To remove a major unit for maintenance, periodic
assistance by consulting the service instruction manual
check, or lubrication, plan the removal carefully. The
for the equipment involved. These manuals often give
route the unit must take from its mounts to the shop
detailed troubleshooting procedures for making the
space must be clear. This includes clearing bench space
initial inspections.
or other areas in the shop where the unit is to be placed.
PERFORMANCE TESTING.--It is necessary
The necessary and proper tools must be obtained.
to make a check of the equipment's performance after
Wrenches, screwdrivers, pliers, and if the equipment is
each periodic inspection or corrective maintenance.
extremely heavy, a hoist, may be required. If help is
The system performance check is a complete
needed, personnel must be obtained. The entire
operational check of the system in all modes of
removal procedure must be thoroughly explained,
operation. This check serves to determine if other
letting each person know his/her specific job. The
malfunctions are present, and it allows evaluation of
person in charge of the removal should issue all
overall system performance.
instructions timed so that the result is a smooth
effective operation. The work should be done with
FINAL CHECKS.--The final check consists of a
caution to eliminate the possibility of injury to
complete and thorough inspection of all the
personnel or damage to the equipment. Observe all
components as well as replacement of all inspection
safety precautions.
panels, plates, and other equipment removed during the
inspection or while performing maintenance. This
NOTE: For specifics on procedures for use or care
includes the use of safety wire, stop nuts, and other
of hand tools, refer to the Use and Care of Hand Tools
means for securing equipment when needed.
and Measuring Tools, NAVEDTRA 14256.
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