MIL-PRF-21260E
Table II. Verification methods - Continued.
Require-
Verifi-
Require-
Verifi-
Title
ments
cation
Title
ments
cation
Seal compatibility
4.3.3.7
Hazardous materials
3.5.2
4.3.5.2
3.3.7
Dispersancy
3.3.8
4.3.3.8
3.6
4.3.6
Operating environment
Corrosion
3.3.9
4.3.3.9
requirements
Bearing corrosion
3.3.9.1
4.3.3.9.1
Humidity
3.6.1
4.3.6.1
Salt water
3.6.2
4.3.6.2
4.1.2 Conformance inspection. The engine lubricating oil supplied under contract shall
have the same base stocks and additive components, at the appropriate concentrations, as when
qualified. Unless otherwise specified (see 6.2, 6.5, and 6.5.1), the finished oil properties and the
foaming characteristics shall be tested as specified in table II to insure that purchased oils are of
the same composition and quality as the respective qualification samples, and to identify the
products. The results obtained shall fall within the tolerances/specific values determined at the
time of qualification (see 4.1.1.1).
4.2 Sampling. Samples from bulk or packaged lots (see 6.8), shall be taken for testing in
accordance with ASTM D4057 or D4177, as appropriate.
4.3 Verification methods. The types of verification methods included in this section are
visual inspection, measurement, sample tests, full-scale demonstration tests, simulation,
modeling, engineering evaluation, component properties analysis, and similarity to previously
approved or previous qualified designs.
4.3.1 Verification alternatives. The manufacturer may propose alternative test methods,
techniques, or equipment, including the application of statistical process control, tool control, or
cost effective sampling procedures, to verify performance. See the contract for alternatives that
replace verification required by this specification.
4.3.2 Inspection conditions. Tests may be conducted, in any sequence, in any plant or
laboratory approved by the qualifying activity (see 6.2 and 6.4).
4.3.3 Operating requirements verification. Complete each test under 4.3.3.
4.3.3.1 Finished oil property verifications. Use the test methods as specified in table III
to determine that finished oil properties are as specified.
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