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|  MIL-N-81604C(AS)
Para 4.4.3.3
(cont)
.
criteria, preventive maintenance to be allowed during the test,
etc., shall be part of the test procedures to be submitted and
approved by the procuring activity prior to the beginning of
*
qualification test phase of the reliability assurance tests.
4.4.4 Special Tests - Special tests shall be conducted for the
purpose of checking the effect of any design or material change
on the performance of the equipment and to assure adequate
quality control. The equipment selected for special tests may
be selected from equipments previously subjected to the
sampling or reliability assurance tests.
4.4.4.1 Special Test Schedule - Selection of equipments for
special tests shall be made as follows:
*
On an early equipment after an engineering or
a.
material change.
*
b.
Whenever failure reports or other information
indicate that additional tests are required.
(This will be determined by the procuring
activity. )
4.4.4.2 Scope of Tests - Special tests shall consist of such
tests as approved by the procuring activity. Test procedures
previously approved for the preproduction tests shall be used
where applicable. When not applicable, the contractor shall
prepare a test procedure and submit it to the procuring activity
for approval prior to conducting the tests.
4.4.5 Equipment Failure - Should a failure occur during either
the sampling, reliability assurance, or special tests, the
following action shall be taken:
*
The cause of failure shall be determined.
a.
*
b.
Whether the failure is an isoolated case or design
*
defect shall be determined.
*
Proposed corrective action intended to reduce the
c.
possibility of the same failure(s) occurring in
*
future tests shall be submitted to the procuring
*
activity.
139
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