MILPRF55110G
APPENDIX A
A.4.7.1.3
A.4.7.1.3 Frequency. The frequency of selecting sample units and performing group B testing shall be on a
monthly basis. The sample units shall be submitted for testing within 30 calendar days after the end of each reporting
period.
A.4.7.1.4
A.4.7.1.4 Failures. If one or more sample units fail to pass group B inspection, the sample shall be considered to
have failed. The qualifying activity shall be notified of any group B failure within 3 business days. Group B inspection
shall be repeated on additional sample units (either all group B inspections or just the group B inspection which the
original sample failed, at the option of the qualifying activity) from the next most complex (see A.7.2) inspection lot
from the same month that the failure occurred. Group A testing and shipment of the product represented by the failed
group B sample shall be discontinued.
A.4.7.1.4.1
A.4.7.1.4.1 Corrective actions. Corrective actions shall be taken 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 (materials, processes, etc.), and which are considered subject to the same failure.
A.4.7.1.4.2
A.4.7.1.4.2 Noncompliance. If the lot or lots directly represented by the group B failure have been shipped, the
manufacturer shall notify the acquiring activity of the failure and shall recall the affected lot or lots for reinspection, if
possible. All other lots represented by extension of qualification by the failed group B sample are considered
noncompliant until a sample from the next most complex (see A.7.2) inspection lot passes group B inspection.
A.4.7.1.4.3
A.4.7.1.4.3 Reinstitution of group A inspection. After successful completion of group B reinspection, group A
inspection of product represented by the group B failure may be reinstituted.
A.4.7.1.5
A.4.7.1.5 Disposition of sample units. Test coupons which have been subjected to group B shall be retained as
specified in A.3.9.
table AV AV TABLE AV
TABLE AV. Group B inspection.
Test coupon by type 1/ 2/
Method
Inspection
Requirement
Type 1
Type 2
Type 3
paragraph
paragraph
Subgroup 1
3/
3/
3/
Rework simulation
Moisture and insulation resistance
E
E
E
Dielectric withstanding voltage 4/
4/
4/
4/
Subgroup 2
5/
5/
5/
Resistance to solvents
5/
Surface peel strength
N
6/
1/
2/
See appendix D for test coupon identification letter translation to the applicable design standard.
3/
The holes to be tested and inspected shall represent component holes used for throughhole mounting.
4/
Dielectric withstanding voltage shall be performed after the moisture and insulation resistance test on the same
test coupon subjected to the moisture and insulation resistance test.
5/
See A.4.8.3.2.1 for test specimen description and number of samples required.
6/
Test coupon N minimum length shall be 2 inches (50.8 mm). A minimum of eight test specimens shall be
inspected. If two or more lots are produced, four test specimens from two lots shall be selected.
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