MIL-PRF-39009E
4.6.3.2.1 Subgroup 1. Subgroup 1 tests shall be performed on a production lot basis of 100 percent of
the lot. Resistors that are out of resistance tolerance, or which experience a change in resistance greater
than that permitted, shall be removed from the lot and not supplied to this specification. Only lots having
not more than 5 percent rejects or one resistor, whichever is greater due to exceeding the specified
resistance change limit, shall be furnished on contracts.
4.6.3.2.2 Manufacturer's production inspection. If the manufacturer performs tests similar to those
specified in group A, subgroup 1, as the final step of his manufacturing process, the subgroup 1 tests may
be eliminated when approved by the qualifying activity. The following criteria must be complied with:
a. The production test is identical or more stringent than the subgroup 1 tests.
b. 100 percent of the product supplied to these tests.
c.
Failure criteria are identical or more stringent than the subgroup 1 tests.
d. Lot rejection criteria are identical or more stringent than the subgroup 1 tests.
e. Once approved, future changes require approval from the qualifying activity.
4.6.3.2.3 Subgroup 2 tests. The subgroup 2 tests shall be performed on an inspection lot basis for ER
parts. A random sample of resistors shall be selected in accordance with table VII. In the event of one or
more failures, the lot is rejected. The rejected lot may be rescreened and the defects removed and
resubmitted to the table VII sample plan. If one or more defects are found in this second sample, the lot is
rejected and shall not be supplied to this specification. (NOTE: This corrective action applies to the
original quality defect found. If another defect type is found in the second sample, a rescreen for that
defect is also permitted).
TABLE VII. Sampling plan for PPM categories.
Lot size
Sample size
Sample size
PPM
subgroup 2
1-
13
100%
100%
14 -
125
13
100%
126 -
150
13
125
151 -
280
20
125
281 -
500
29
125
501 - 1,200
34
125
1,201 - 3,200
42
125
3,201 - 10,000
50
125
10,001 - 35,000
60
294
35,001 - 150,000
74
294
150,001 - 500,000
90
345
500,001 and over
102
435
14
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