MIL-PRF-87260B(USAF)
4.
VERIFICATION
4.1 Classification of tests.
The inspection requirements specified herein are classified as follows:
Qualification tests (4.3)
a.
Conformance inspection (4.4)
b.
4.2
Test conditions.
4.2.1 Temperature and humidity.
Unless otherwise specified herein, all tests shall be conducted under known conditions of
temperature and relative humidity. Prior to physical property testing, specimens shall be
preconditioned in the test environment a minimum of 30 minutes.
4.2.2 Test fluids.
Unless otherwise specified herein, the test fluids shall be of known properties and certified in
accordance with the referenced military specification. The turbine fuels conforming to MIL-DTL-
83133 may be obtained from the qualifying activity along with a certified test report defining, as
a minimum, the specific gravity, distillation, aromatic content, existent gum, sulfur content, fuel
system icing inhibitor level, and fuel electrical conductivity level.
4.2.3 Basic property testing.
Unless otherwise specified herein, all basic property tests shall be in accordance with the
applicable sections specified in ASTM D3574. In the case where more than one specimen is
tested, the average shall be determined. However, all values shall be reported for all but
production testing. Unless otherwise specified, all sample specimens shall be tested in the dry
condition. In the case where fuel-wet testing is required (special tension, tear resistance, and
compression load deflection tests) the specimen should be removed from the test fluid
immediately prior to property testing, drained of excess fuel, and then tested.
4.2.4 Specimen cutting.
Unless otherwise specified herein, test specimen cutting shall be by die, saw cutting, or hot wire
cutting.
4.3 Qualification testing.
See 6.3.
4.3.1 Test sample(s).
The specific bun(s) of material chosen for the qualification tests shall be typical of future
production buns in terms of density and porosity (air pressure drop). Unless otherwise specified
herein, this bun shall be selected from near the midrange in allowable porosity properties.
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