MIL-DTL-15743E
4.3.3 Failures. One or more failures shall be cause for refusal to grant first article acceptance.
4.3.4 First article extension. First article acceptance for a given size enclosure with a single switch
may be used as evidence of acceptance of smaller sizes (see 6.4.1). The extension, however, in no way
changes the conformance inspection in accordance with 4.4.
4.4 Conformance inspection.
4.4.1 Inspection of product for delivery. Inspection of product for delivery shall consist of groups A and
B inspection.
4.4.1.1 Lot. For the purpose of conformance inspection and test sampling, a lot is defined as all the
enclosed switches of the same military part number (symbol number), produced in one facility, using the
same production processes and materials, and being offered for delivery at one time.
4.4.1.2 Sampling for group A inspection. As a minimum, the contractor shall randomly select a sample
quantity from each lot of completed enclosed switches in accordance with table III and inspect them in
accordance with table II for the defects listed in table IV. If one or more defects are found in any sample,
the entire lot represented by the sample shall be rejected. If a lot is rejected, the contractor has the
option of screening 100 percent of lot for the defective characteristic(s) or providing a new lot which shall
be inspected in accordance with the sampling plan contained herein. The contractor shall maintain for a
period of 3 years after contract completion all records of inspections, tests, and any resulting rejections.
TABLE II. Group A inspection.
Test method
Inspection
Requirement paragraph
paragraph
Visual and dimensional
examination
Mechanical operation
TABLE III. Sampling for group A inspection.
Sample size
Lot size
Major
Minor
defects
defects
2 to
8
All
3
9 to
25
8
3
26 to
50
8
5
51 to
90
8
6
91 to
150
12
7
151 to
280
19
10
281 to
500
21
11
501 to 1,200
27
15
1,201 to 3,200
35
18
3.201 to 10,000
38
22
10
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