MIL-PRF-27208F
TABLE VIII. Group B inspection. 1/ 2/
Requirement
Method
Sampling
Inspection
paragraph
paragraph
plan
Subgroup 1
Actual effective electrical travel
Dielectric withstanding voltage
Insulation resistance
Torque
Subgroup2
Thermal shock
1/ If the manufacturer can demonstrate that this test has been performed 5 consecutive times with
zero failures, the frequency of this test, with approval of the qualifying activity, can be performed
on an annual basis. If the design, material, construction or processing of the part is changed, or
if there are any quality problems or failure, the qualifying activity may require resumption of the
original test.
2/ See table XII.
4.6.1.3.1 Sampling plan.
4.6.1.3.1.1 Subgroup 1. A sample of parts shall be randomly selected in accordance with table IX. If one or more
defects are found, the lot shall be screened and defectives removed. After screening and removal of defectives, a
new sample of parts shall be randomly selected in accordance with table IX. If one or more defects are found in the
second sample, the lot shall not be supplied to this specification.
TABLE IX. Group B sampling plan.
Lot size
Sample size
1 to
25
3
26 to
50
5
51 to
90
6
91 to
150
7
151 to
280
10
281 to
500
11
500 to
1,200
15
1,201 to
3,200
18
3,201 to 10,000
22
10,001 to 35,000
29
35,001 to 150,000
29
150,001 to 500,000
29
500,001 and over
29
4.6.1.3.1.2 Subgroup 2. A sample of parts shall be randomly selected in accordance with table IX. If one or more
defects are found, the lot shall be screened and defectives removed. After screening and removal of defectives, a
new sample of parts shall be randomly selected in accordance with table IX. If one or more defects are found in the
second sample, the lot shall not be supplied to this specification.
4.6.1.3.1.3 Disposition of sample units. Sample units that have passed all of the Group B inspection may be
delivered on the contract or order.
4.6.2 Alternate inspection. For retention of qualification and conformance inspection (see 4.5 and 4.6) the results
on identical items covered by MIL-PRF-39015 may be used.
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