MIL-PRF-23269G
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4.6.2 Periodic group C inspection. Group C inspection shall be performed on sample units which have been
subjected to and have passed the applicable tests for group A inspection and shall consist of the tests specified in
table V, in the order shown. Delivery of products which have passed group A inspection shall not be delayed
pending the results of periodic inspection.
4.6.2.1.1 Sampling plan.
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4.6.2.1.1.1 Group I. Fifty-one sample units shall be taken from production every 2 months and subjected to the
applicable tests for their particular subgroup. Allowable failures shall be as specified in table V.
4.6.2.1.1.2 Group II. A minimum of 10 sample units shall be selected from each inspection lot produced during a
2-month period. Allowable failures shall be as specified in MIL-STD-690. The accumulated data shall be used for
maintenance and extension of FR qualification.
4.6.2.1.2 Noncompliance. If a sample unit fails to pass group C inspection, the manufacturer shall notify the
qualifying 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 were manufactured under essentially the same conditions,
with essentially the same materials and processes, and which are considered subject to the same failure.
Acceptance of the product shall be discontinued until corrective action acceptable to the Government, has been
taken. After the corrective action has been taken, group C inspection shall be repeated on additional sample units
(all inspection or the inspection which the original sample failed, at the option of the Government). Group A
inspection may be reinstituted; however, final acceptance shall be withheld until the group C inspection has shown
that the corrective action was successful. In the event of failure after re-inspection, information concerning the
failure and corrective action taken shall be furnished to the cognizant inspection activity and the qualifying activity.
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TABLE V. Group C inspection.
Number of
Number of
Test method
Test
Requirement
failures allowed
sample units
paragraph
paragraph
to be inspected
Group I
Subgroup IA 1/
1
24
Thermal shock
Subgroup IB 1/
Quality factor(Q)
1
12
Shock, specified pulse
Vibration, high frequency
1
Subgroup IC 1/
Terminal strength
1
12
Barometric pressure
Temperature coefficient and capacitance drift
Salt atmosphere
Subgroup ID 1/
Resistance to solvents
0
3
Resistance to soldering heat
Moisture resistance
Group II
(See 4.6.2.1.1.2)
10 minimum
Life (accelerated conditions)
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1/ If the manufacturer can demonstrate that these tests have been performed five consecutive times with zero
failures, then these tests, with the approval of the qualifying activity, can be deleted. The manufacturer, however,
shall perform these tests every three years after the deletion as part of long term design verification. If the
design, material, construction, or processing of the part is changed or, if there are any quality problems, the
qualifying activity may require resumption of the specified testing. Deletion of testing does not relieve the
manufacturer from meeting the test requirement in case of dispute.
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