MIL-DTL-28791C
TABLE III. Group A inspection.
Examination or test
Requirement
Test method
paragraph
paragraph
Visual and mechanical
examination
3.13 and 3.14
Dielectric withstanding
voltage 1/
1/ Applicable to coaxial only.
4.6.1.2.1 Group A sampling plan. Statistical sampling and inspection shall be performed on an inspection lot basis
with a random sample of isolators or of circulators selected in accordance with table IV. The acceptance levels shall
be based upon the zero defective sampling plan. No failures shall be permitted.
4.6.1.2.2 Rejected lots. If an inspection lot is rejected, the supplier may rework it to correct the defects, or screen
out the defective units, and resubmit for re-inspection (see 4.6.1.2.1). Such lots shall be separate from new lots, and
shall be clearly identified as reinspected lots.
TABLE IV. Group A sampling plan.
Lot size
Sample size
1-13
100 percent
14-150
13
151-280
20
281-500
29
501-1200
34
1201-3200
42
3201-10,000
50
10,001-35,000
60
35,001-150,000
74
150,001-500,000
90
500,001 and over
102
4.6.1.3 Group B inspection. Group B inspection shall consist of the examinations and tests specified in table V, in
the order shown, and shall be made on five (5) sample units which have been subjected to and have passed the
group A inspection.
TABLE V. Group B inspection.
Test
Requirement
Test
paragraph
paragraph
Isolation
Insertion loss
VSWR
4.6.1.3.1 Rejected lots. If an inspection lot is rejected, the supplier may rework it to correct the defects, or screen
out the defective units, and resubmit for re-inspection (see 4.6.1.3). Such lots shall be separate from new lots, and
shall be clearly identified as reinspected lots.
4.6.1.3.2 Disposition of sample units. Sample units that have passed all the group B inspection may be delivered on
the contract or purchase order if the lot is accepted and the sample units are still within specified electrical tolerances.
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