188.8.131.52 Methods for Particulate Contaminants Testing
Measuring the amount of particulate contaminants present in the aviation
fuel sample can be accomplished using one or both, of two test methods: the
Color Comparator Method and/or the Gravimetric Method.
The Color Comparator Method can be performed at the test location with
visual analysis; this method is a quick way to check fuel and is recommended for
an initial check of the samples particulate contaminant level. If color comparator
test results are marginal or unacceptable, perform a gravimetric test. The
Gravimetric Method involves measurement of contaminants through off-site
laboratory analysis and is a more exact method.
The Color Comparator Method and Gravimetric Method tests are
accomplished in nine procedural steps (as outlined below and on the test kit
placard): the first eight steps are the same for both methods. The ninth step or
the analysis step varies according to the test method: when using the Color
Comparator Method, analysis of the sample is made using the Aviation Turbine
Fuel Contamination Standards booklet included in the test kit (see booklet for
more detail). When testing the sample gravimetrically (using the Gravimetric
Metiod), you must ship the sample to the nearest approved laboratory for
All parts and tools referred to in the following steps can be identified in
Figure 1.1, page 1-5, or on the test kit placard (see Loading Plan).
2.3.2 Installing the Quick-Release Valve
Using the eight-inch adjustable wrench, attach the quick-release valve to
the designated point on the system (this will vary with the type of equipment you
are using, however, attach the valve in a horizontal position on the system or at
the top of the system to allow for proper flushing). See Figure 2.1.
Make sure that the pressure in system does not exceed 100 psi.