MIL-C-81861(AS)
Note
If by contract action the initial production tests (4.3) are
deleted, then a sample test shall be conducted on 1 equipment
from the first 10 produced.
a. Complete operational test at ambient room conditions, making all necessary
measurements to assure that all applicable specification requirements have been met.
b. Operational tests at certain environmental conditions. The conditions may
vary for each equipment tested and should be based on results of the preproduction,
initial production, individual, and special tests.
c. manufacturing run-in test specified in 4.4.1.3 except that the test duration
shall be 120 hours with no restriction on the nuniber of failures. However, each
failure shall be analyzed as to cause and remedial action necessary to reduce the
possibility of its recurrence in future equipments.
Reliability Assurance Tests. Reliability Assurance Tests shall be
4.4.3
conducted using MIL-STD-781. Tests as required by both the Qualification Phase and
the Production Acceptance (Sampling) Phase shall be conducted. Classification of
failure shall be in accordance with MIL-STD-781 and AR-34.
Qualification Phase. Prior to the acceptance of equipments under the
4.4.3.1
contract or orders a minimum of three equipments shall be tested as outlined in
MIL-STD-781, under the section entitled "Qualification Phase of Production Reliability
Test". The maximum number of equipments to be used shall be those listed in table
5 of MIL-STD-781. For the Qualification Phase, Test Level F shall be used. The
Accept-Reject Criteria for Test Plan IV shall be used.
Reliability Production Acceptance (Sampling) Phase Tests. The
4.4.3.2
equipment, throughout production, shall be tested as outlined in MIL-STD-781 (as
modified herein) under the section entitled Production Acceptance (Sampling) Phase
of Production Reliability Tests". Test level F shall be used.
Test Details. The test details such as the length of the test cycle,
4.4.3.3
the length of the heat portion of the cycle, the performance characteristics to be
measured, special failure criteria, and preventive maintenance to be allowed during
the test, shall be part of the test procedures to be submitted and approved by the
procuring activity prior to the beginning of the qualification test phase of the
reliability assurance tests.
Special Tests. Special tests shall be conducted for the purpose of
4.4.4
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.
Selection of equipments for special tests
Special Test Schedule.
4.4.4.1
shall be made as follows:
On an early equipment after an engineering or material change.
a.
b. Whenever failure reports or other information indicate additional tests are
required. (This will be determined by the procuring activity.)
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