Section V. Preventive Maintenance Checks and Services
(Monthly and Quarterly)
To insure that the power plant is ready for operation
at all times, it must be inspected systematically so that
defects may be discovered and corrected before they
result in serious damage or failure. The necessary
preventive maintenance checks and services to be
performed are listed and described in paragraph 4-12.
The item numbers indicate the sequence of minimum
inspection requirements. Defects discovered during
operation of the unit will be noted for future correction,
to be made as soon as operation has ceased. Stop
operation immediately if a deficiency is noted during
operation which would damage the equipment if
operation were continued. All deficiencies and
shortcomings will be recorded, together with the
corrective action taken, on DA Form 2404 (Equipment
Inspection and Maintenance Worksheet) at the earliest
4-12. Preventive Maintenance Checks and Services
Preventive maintenance checks and services are
listed and described in table 4-1.
Section VI. Troubleshooting
This section contains troubleshooting informa-
tion for locating and correcting most of the operating
trouble which may develop in the power plant. Each
malfunction for an individual component, unit, or system
is followed by a list of tests or inspections which will help
you to determine probable causes and corrective actions
to take. You should perform the tests/inspections in the
This manual cannot list all malfunctions that
may occur, nor all tests or corrective actions. If a
malfunction and its corrective action is not listed, notify
breakers, switches and relays are performed
in a similar manner.
A gas turbine engine analyzer is used in
conjunction with table 4-2 for checking engine operation
troubleshooting, and for check and adjustment of engine
components after repair. The connection and operation
of the engine analyzer is described in paragraph 4-14.
A temperature conversion chart is provided in table 4-3.
4-14. Using Gas Turbine Engine Analyzer During
Gas Turbine Engine Analyzer. The gas turbine
engine analyzer provides instrumentation for checking
the engine electrical, hydraulic, and control air systems,
and for controlling and monitoring engine operation
during troubleshooting or checking procedures after
repair. The analyzer includes a separate portable fuel
pressure gauge and gauge saver, a multimeter, and
special cable assemblies, all of which are stored in the
analyzer case. The analyzer control panel is shown in
figure 4-14. The analyzer cables, hoses, and a special
purpose cable assembly required to connect the
analyzer to the power plant are shown in figure 4-15.
The three hoses required are not part of the analyzer
and must be procured separately. An overlay plate, part
of the special purpose cable assembly, which must be
installed on the analyzer panel to provide connection
nomenclature, is shown in figure 4-15.
Connection of Gas Turbine Engine Analyzer to
Power Plant. Connect the analyzer to the power unit as
shown in figure 4-16 while observing the following.
Place analyzer in a convenient position
near the left side of the power plant to facilitate
connections. Insure that all analyzer switches are in
OFF or spring-loaded position before making any
connections to power plant.
Install main receptacle of special purpose
cable assembly on MAIN plug of analyzer panel. Install
overlay plate (figure 4-15), attached to special purpose
cable assembly, over analyzer indicator lights and
switches locating cutout in plate over READY TO LOAD
LIGHT on analyzer panel (figure 4-14) to provide correct
identification of analyzer lights, switches, and static test
Disconnect engine harness receptacle J36
from power plant plug P36 (figure 4-16). Connect
engine plug on special purpose cable assembly to
engine harness receptacle J36; connect power plant
receptacle P36 on special purpose cable assembly to
power plant plug P36.
receptacle J14 from power plant plug P14. Connect
instrument panel plug on special purpose cable
assembly to instrument panel harness receptacle J14.
Connect power plant receptacle P14 on special purpose
cable assembly to power plant plug P14.