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|  MIL-T-85472A(AS)
4.5.2.1 Scope of tests. As a minimum, each test set selected for sampling
tests shall be subjected to the following:
a.
Complete operational test at ambient room conditions, making
all necessary measurements to assure that all applicable
specification requirements have been met.
b.
Operational test at certain environmental conditions. The
conditions may vary for each test set tested and should be
based on results of the first article, individual, and
special tests.
Manufacturing run-in test specified in 4.5.1.3 except that
c.
the test duration shall be 120 hours with no restrictions on
the number of failures.
4.5.3 Reliability assurance tests. Reliability assurance tests shall be
conducted in accordance with the requirements on MIL-STD-781. Tests shall be
conducted as required for both the qualification phase and the production
acceptance phase.
4.5.3.1 Reliability qualification phase.
Prior to acceptance of test sets
under contract or purchase order, a contractually specified quantity of test
sets (at least one if not specified) shall be subjected to the combined
reliability qualification requirements for fixed ground test set (category 1)
= 200) (see 6.2.1).
of MIL-STD-781, using Test Plan IC therein
4.5.3.2 Reliability acceptance phase. Production lot samples of the test
sets shall be subjected to the combined production reliability acceptance
requirements for fixed group equipment (category 1) of MIL-STD-781, using
= 100).
Test Plan VC therein
4.5.3.2.1 Acceptance phase sample size. The entire contract quantity (except
for those test sets used in the qualification phase) shall be considered one
lot. The reliability acceptance sample size shall be ten percent of the
contract quantity (at least one unit). The test program shall start the first
month after the qualification phase has been completed. The sample(s) shall
be tested until an accept/reject decision has been reached. In the meantime,
other test sets manufactured may be shipped in place, if acceptable to the
procuring officer. The procuring activity reserves the right to stop the
acceptance of test sets anytime after one or more reject decisions have been
reached, pending a review of the contractor's efforts to improve the test sets,
parts, and quality control in order that the entire contract quantity will
result in an accept decision.
4.5.3.3 Test details. The test details shall be part of test procedures
prior to the beginning of the qualification test phase of the reliability
assurance tests.
4.5.3.3.1 Temperature extremes.
The temperature extremes shall be limited to
to +71
storage and -O
to +50
operating.
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4.5.3.3.2 Voltage cycling.
Voltage cycling in accordance with MIL-STD-781 is
not required.
4,5.4 Special tests. Special tests shall be conducted on a quantity of test
sets as specified in the contract (see 6.2.1) for the purpose of checking the
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