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MIL-T-81527B(AS)
(c) Perform operational test at environmental conditions when the
results from the preproduction test indicate that these environmental con-
ditions cause degradations) which result in marginal or unsatisfactory per-
formance.
4.3.3 Special Tests.
Special Tests shall be conducted on quantity of
equipments for purpose of checking the effect of any design or material
change on the performance of equipment and to assure adequate quality con.
trol.
The equipment selected for special tests may be selected from equip-
ment previously subjected to the sampling tests.
4.3.3.1 Special Test Schedule. Selection of equipments for special tests
shall be made as follows:
(a) On an early production equipment.
(b) On an equipment midway through the production run.
(c) On an early equipment after an extensive engineering change.
(d) When failure reports or other information indicate additional
equipment should be tested.
(This will be determined by the procuring
activity.)
Exceptions from the above may be necessary when the number of equipments
procured under contract or other factors affecting performance may require
a variation to assure satisfactory control.
The maximum number of special
tests shall be defined by the procuring agency at the time of request for bids.
4.3.3.2 Scope of Tests. Special tests shall consist of tests selected by the
Test procedures previously approved for the preproduc-
procuring activity.
tion and sampling tests shall be used where applicable. As a minimum, the
following tests shall be made, except that for those equipments selected as
a result of design changes and failure reports, only such tests required to
check the characteristics in question need be conducted:
(a) Temperature - Altitude Tests
(b) Vibration Tests (90 minutes cycling in each of 3 planes)
(c) Humidity Tests
.
90
.

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