2. An operational procedures check-off list
for this program are presented in the form of an
i n s t r u c t i o n . Although this instruction may vary
3. Centrifugal purifier cleaning actions
somewhat in the procedures it includes, the goals are the
4. Prefilter and filter/separator replacement actions
same. To accomplish these goals, gas turbine ships must
maintain lubricating oil logs.
Samples of lubricating oil should be taken at
The information in the fuel management log serves
definite intervals to determine whether the oil meets all
as an integral part of shipboard maintenance. It aids in
requirements. The results of the samples must be entered
the prevention of delivery of contaminated fuel to the
i n the proper log as specified in the Lube Oil
gas turbine engines.
JP-5 LOGS.-- Since most gas turbine ships can
PETROLEUM FUEL LOGS.-- Stringent fuel
support helicopters, an aviation fuel (JP-5) system is
quality requirements protect gas turbine engines from
installed. Fuel quality requirements are more critical and
serious damage, such as corrosion of the gas turbine hot
extensive for JP-5 fuel than other fuels. Minute amounts
section, fouling of engine controls, and plugging of fuel
of dirt and water in the fuel can cause engine failures.
n o z z l e s . Maintaining a fuel system log helps the
To monitor for these conditions, the oil lab should
engineering department to achieve these requirements.
maintain a fuel sample log. This log will include a
An example of a fuel management log is shown in
sequential listing of samples submitted for testing and
figure 1-4. This log is a locally prepared document that
the results of the tests as they are reported by the testing
includes spaces for recording the results of all shipboard
laboratory. The oil lab should include the following
fuel tests. Whenever test results exceed maximum
information in the JP-5 sample log:
parameters, the entries should include notations that
Identification of the ship submitting the sample
corrective actions have been taken.
(name and hull number)
T h e fuel management log should include the
Type of fuel
following important categories:
Date the sample is drawn
1. A sequential listing of sample analyses
Figure 1-4.--Suggested Fuel Management Log.