MIL-DTL-27467B
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2 First article inspection. First article inspection shall be performed on one complete Headset, Electrical
H-154A/AIC when first article sample is required (see 3.1). This inspection shall include the examination of 4.4 and
4.3 Conformance inspection. Conformance inspection shall include the examination of 4.4 and the tests of 4.5.1
through 4.5.4.
4.3.1 First article. A minimum of 10 headsets shall be subjected to the preproduction tests in the quantities
indicated in 4.5. At least 3 headsets shall be subjected to each of the preproduction tests. More than one
preproduction test may be performed on any one headset provided it has not been damaged by a previous test.
4.4 First article tests. Acceptance tests shall consist of:
a. Individual tests (see 4.4.1).
b. Sampling plan and tests (see 4.4.2).
4.4.1 Individual tests. Each headset shall be subjected to the individual tests listed in 4.5.
4.4.2 Sampling plan and tests. At least one headset shall be selected at random from every 100 headsets
produced and be subjected to the environmental tests listed in 4.5.
4.4.2.1 Sampling plan. A sample of parts shall be randomly selected in accordance with table I, if one or more
defects are found, the lot shall be re-screened and defects removed. After screening and removal of defects, a new
sample of parts shall be randomly selected in accordance with table I, if one or more defects are found in the second
sample, the lot shall be rejected and shall not be supplied to this specification.
TABLE I. Sampling plan.
Lot size
Sample size
2
to
8
1/
9
to
15
13 1/
16
to
25
13
13
26
to
50
51
to
90
13
91
to
150
13
20
151
to
280
281
to
500
29
501
to 1200
34
1201
to 3200
42
1/ Indicates entire lot must be inspected or sample size not to exceed lot size.
4.4.2.2 Rejection and retest. When one item selected from a production run fails to meet the specification, no item
still on hand or later produced shall be accepted until the extent and cause of failure are determined.
4.4.2.3 Individual tests may continue. For operational reasons, individual tests may be continued pending the
investigation of a sampling test failure. But final acceptance of items on hand or produced later shall not be made
until it is determined that items meet all the requirements of the specification.
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