MIL-DTL-38219D(USAF)
4.5.1.2 Examination of empty containers. Before filled, each empty unit container shall be visually inspected for
cleanliness and suitability in accordance with ASTM D4057.
4.5.1.3 Examination of filled containers. Samples taken as specified in 4.3.2 shall be examined for conformance
to MIL-STD-290 with regard to fill, closure, sealing, leakage, packaging, packing, and markings. Any container with
one or more defects under the required fill shall be rejected.
4.5.2 Chemical and physical tests. Tests to determine conformance to chemical and physical requirements (see
3.3) shall be conducted in accordance with the applicable test methods (FED-STD-791 or ASTM) listed in table I,
except for those specified herein.
4.5.2.1 Thermal stability. The thermal stability test shall be conducted using ASTM D3241 (JFTOT), as modified
below. The heater tube shall be rated for deposits using the Alcor Mark 8A Tube Deposit Rater (TDR) as modified
in accordance with appendix B or the Alcor Mark 9 TDR (see 4.5.2.1.2a).
4.5.2.1.1 Test conditions
a. Heater tube temperature at maximum point:
355°C (671°F)
b. Fuel system pressure:
3.45 MPa (500 pounds/square inch of gravity)
c. Fuel flow rate:
3.0 mL/minute
d. Test duration:
300 minutes
e. Quantity of test fuel:
1 liter
4.5.2.1.2 Test results. The fuel sample is acceptable, if all the following criteria are met:
a. The maximum differential between the post-test and the pretest TDR spun rating does not exceed 12 TDR
units. Both before and after the JFTOT test, use the modified Mark 8A or Mark 9 TDR to rate the heater tube at 2-
millimeter (mm) increments from 20 mm to 50 mm along the length of the heater tube. The maximum delta
increase in the TDR ratings (i.e., the maximum difference measured between the post-test and the pretest TDR
rating) shall be reported. If the maximum increase in TDR rating does not exceed 12 TDR units, the results are
satisfactory.
b. The maximum differential pressure across the test filter shall be reported. The results are satisfactory if the
differential pressure drop does not exceed 25 mm of mercury.
4.5.2.1.3 Reported data. The following data shall be made available when requested by the Procuring Activity or
user:
a. Tube deposit TDR ratings.
b. Differential pressure across the test filter.
4.5.2.2 Vapor pressure. The vapor pressure test shall be conducted in accordance with appendix A or appendix C.
4.5.3 Storage stability. The storage stability test on the finished fuel shall be conducted by placing 200 ±3.8 liters
(53 ±1 gallons) of fuel in a 208-liter (55-gallon), 18 gauge DOT 17E uncoated steel drum. The filled drum shall be
stored at 54.4°C (130°F) for 1 year (12 months). Samples shall be withdrawn at 3-month intervals and subjected to
the thermal stability test (see 4.5.2.1). The fuel will be subjected to all test requirements of table I at the conclusion
of the 12-month storage stability test. If the fuel fails any of the 3-month thermal stability tests, the fuel shall be
resampled and retested to insure the initial sample was valid. Failure of the thermal stability test at any 3-month
interval or failure of any of the table I test requirements at the conclusion of the 12-month storage stability test
constitutes a failure of the storage stability test (see 4.2.1). This test will be conducted by the Air Force Research
Laboratory (AFRL/PRSF), Bldg 490, 1790 Loop Road N, Wright-Patterson AFB OH 45433-7103.
4.6 Test report. Test data required by 4.5.2 shall be made available in the same order as listed in table I, when
requested by the Procuring Activity.
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