DOD-PRF-85734A
3.5 Full-scale performance requirements.
3.5.1 Turboshaft engine. The oil shall be tested in a full-scale turboshaft engine in
accordance with 4.4.5 to evaluate its serviceability and to ensure that engine components are
compatible with the lubricating oil. The post-test condition of the engine shall not indicate
excessive or unusual deposits, wear or corrosion which are attributed to the test oil.
3.5.2 Service evaluation. The oil shall be rated as satisfactory after the model type test
evaluation and flight evaluation of 4.4.7.
4. VERIFICATION
4.1 Classification of inspections. The inspection and testing of lubricating oil shall be
classified as follows:
a. Qualification inspection (see 4.2)
b. Conformance inspection (see 4.3)
4.2 Qualification inspection. Qualification inspection shall consist of testing to all the
requirements specified in section 3. When required by the qualification activity, additional
evaluations (engine and flight test service evaluation) shall be conducted on candidate
formulations. The extended storage stability tests (see 4.4.3) shall be performed after the
candidate product has passed all other qualification tests. Tentative qualification approval shall
be granted to products undergoing the extended storage stability tests. Upon successful
completion of the extended storage stability test, full qualification approval shall be granted.
Failure to pass the extended storage stability tests is cause for withdrawal of qualification
approval.
4.2.1 Requalification. Requalification shall be required when any reformulation or change
is made in source of manufacture, purity, or composition of the lubricating oil base stocks or
additives. Requalification is also required for any changes in the manufacturing process or plant
locations of the finished product, it's additives or basestock(s). A minor change in the oil
formulation shall not be made unless approved by the qualification activity (see 6.3).
4.3 Conformance inspection. Conformance inspection shall consist of all of the tests
specified in table III. Failure to pass any conformance test shall be cause for rejection of the lot.
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