MIL-PRF-55339C
4.4.2.1.1 Sampling plan. Six sample units of the same PIN shall be selected from the first lot
produced after the date of notification of qualification. Thereafter, six sample units of the same part
number shall be selected from current production after 200,000 adapters have been produced, or not
less than once every three years, whichever occurs first. The sample units shall be divided equally
and subjected to the inspections of the two subgroups.
4.4.2.1.2 Failures. If one or more sample units fail to pass group C inspection, the lot shall be
considered to have failed.
4.4.2.1.3 Disposition of sample units. Sample units which have been subjected to group C
inspection shall not be delivered on the contract or order.
4.4.2.1.4 Noncompliance. If a sample fails to pass group C inspection, the manufacturer shall notify
the qualifying activity and the cognizant inspection activity of such failure and take corrective action
on the materials or processes, or both, as warranted, and on all units of product which can be
corrected and which are manufactured under essentially the same materials and processes, and
which are considered subjected to the same failure. Acceptance and shipment of the product shall be
discontinued until corrective action, acceptable to the qualifying activity has been taken. After the
corrective action has been taken, group C inspection shall be repeated on additional sample units (all
tests and examinations, or the test which the original sample failed, at the option of the qualifying
activity). Groups A and B inspections may be reinstituted; however, final acceptance and shipment
shall be withheld until the group C inspection has shown that the corrective action was successful. In
the event of failure after reinspection, information concerning the failure shall be furnished to the
cognizant inspection activity and the qualifying activity.
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