MIL-PRF-83530C
TABLE VI. Group B sampling plan.
Group B
Lot size
sampling plan
1 to
50
5
51 to
90
7
91 to
150
11
151 to
280
13
281 to
500
16
501 to
1,200
19
1,201 to
3,200
23
3,201 to
10,000
29
10,001 to
35,000
35
35,001 and over
40
4.7 Periodic inspection. Periodic inspection shall consist of group C inspection. Except where the results of these
inspections show noncompliance with the applicable requirements (see 4.7.2.1.3), delivery of products which have
passed groups A and B inspections shall not be delayed pending the results of these periodic inspections.
4.7.1 Group C inspection. Group C inspection shall consist of the tests specified in table VII. They shall be
performed on sample units of each style and characteristic selected from lots which have passed groups A and B
inspections.
4.7.1.1 Sampling plan. Sample size and frequency of sampling shall be as specified in table VII.
4.7.1.2 Disposition of sample units. Sample units which have been subjected to group C inspection shall not be
delivered on the contract.
4.7.1.3 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 shall take corrective action on the materials or
processes, or both, as warranted, and on all units of product which can be corrected and which were manufactured
under essentially the same conditions, with essentially the same materials, processes, etc., and which are considered
subject 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 inspections or the inspection which the original sample failed, at the
option of the qualifying activity). Groups A and B inspection may be reinstituted; however, final acceptance and
shipment shall be withheld until the group C reinspection has shown that the corrective action was successful. In the
event of failure after reinspection, information concerning the failure and the corrective action taken shall be furnished
to the cognizant inspection activity and the qualifying activity.
TABLE VII. - Group C inspection.
Requirement
Test method
Number of
Failures
Inspection
paragraph
paragraph
sample units
allowed
Every 6 months
High temperature storage
Operating life (steady state)
Pulse life rating
10 for
0
Shock
each test
Vibration
Constant acceleration
Energy
11
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