MIL-PRF-87100A(USAF)
4.2.3 Requalification. Requalification shall be required when any change is made in source of manufacture,
purity, or composition of the lubricating oil base stocks or additives. A minor change in the oil formulation may be
made without requalification testing, but only after notification to, and approval by, the qualifying activity (see
6.3). Each reformulation request shall include a certified test report (see 4.2.2).
4.3 Conformance inspection. Conformance inspection of production lots shall consist of all the tests specified in
table II. Failure of production lots to pass any of the conformance tests shall be cause for rejection of the lot.
4.3.1 Sampling. Each bulk lot (see 6.7) of material shall be sampled at random in accordance with ASTM D4057
and ASTM D4177 for the conformance inspection tests (see 4.3).
4.3.2 Inspection. Inspections shall be conducted in accordance with FED-STD-791, method 9601, "Inspection
Requirements."
4.3.2.1 Examination of filled containers. A random sample of filled containers from each lot (see 6.7), taken in
accordance with ASQC-Z1.4, shall be examined for conformance to MIL-STD-290 with regard to fill, closure,
sealing, leakage, packaging, packing, and markings. Reject any container having one or more defects or for being
under the required fill. If the number of defective or underfilled containers exceeds the accepted number for the
appropriate sampling plan of ASQC-Z1.4, reject the lot represented by the sample.
4.3.3 Conformance inspection test report. A copy of the conformance inspection report on each lot of oil
produced for US Government use shall be forwarded to the Propulsion Directorate, AFRL/PRSL, Bldg 490, 1790
Loop Road North, Wright-Patterson AFB OH 45433-7103.
4.4. Test methods. All tests shall be performed in accordance with tables I and II, and 4.4.1 through 4.4.5.
4.4.1 Additional tests. At the time of qualification, the right is reserved to subject the oil to such additional tests
as are considered necessary to assure the serviceability of the material.
4.4.2 Trace metal content. The trace metal content of the oil shall be determined with an atomic emission (A/E
35U-3 or FAS-2C) spectrometer. Using JOAP spectrometric standards, the spectrometer shall be calibrated in
accordance with paragraphs 4-32, 4-33, 4-46, and 4-47 of Air Force Technical Order 33A6-7-24-11. Immediately
after standardizing the spectrometer, 5 determinations of the oil for trace metal content shall be performed. The
average of the 5 determinations shall be reported. Samples which require trace metal content determinations may
be sent with a request for analysis to:
Joint Oil Analysis Program
Technical Support Center
ATTN: JOAP Lab
296 Farrar Road
Pensacola FL 32508-5010
4.4.3 Bearing deposition. To determine compliance with the requirements of 3.4.1, bearing test determinations
shall be conducted in accordance with FED-STD-791, Method 3450, and the following:
Test conditions
Metal specimens
Test-oil sump Temperature: 300ºC(572ºF)
Aluminum (QQ-A-250/4, T3 or T4)
Bearing Temperature: 360ºC(680ºF)
Silver (Mil-S-13282, Grade A)
Test-oil in Temperature: 295ºC(563ºF) min
Mild Steel (A-A-51057, Grade 1009, cold
Test-oil return Temperature: 280ºC(536ºF) min
rolled, condition No. 4 or 5)
M-50 Steel (AMS 6490)
Waspaloy (AMS 5544)
Titanium (AMS 4908)
Suitable insulation should be appropriately applied to achieve the required test-oil in temperature and the test-oil
return temperature.
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