MILPRF55110G
APPENDIX D
D.4.3.2
D.4.3.2 Group B samples and testing. Samples to be selected for group B testing should be based on the most
complex compliant printed wiring boards produced that month. For example, if printed wiring boards are produced to
MIL-P-55110D, MIL-PRF-55110E with amendment 1, and MIL-PRF-55110F during a given month, and the most
complex printed wiring boards produced that month were in the lot ordered to MIL-PRF-55110E with amendment 1,
then that should be the lot from which the group B sample should be selected. The samples should be tested in
accordance with MIL-PRF-55110E with amendment 1. If during that same month, printed wiring boards were
produced to MIL-P-55110A and MIL-P-55110B, group B tests to those specific revisions would also be required in
order to be compliant to those revisions, unless specifically specified in the contract.
D.4.4
D.4.4 Superseded test coupons. Before MIL-P-55110C, test coupons were only used for first article inspection and
not required for production. The production panel test coupons were introduced within MIL-P-55110C and
MIL-STD-275D were for the supplier certification program concept. The production test coupons of MIL-P-55110C,
described within MIL-STD-275, should be used when already incorporated onto production tooling. New designs or
jobs should use the test coupons specified in IPC-2221.
D.4.4.1
D.4.4.1 Test coupons, placement, quantity, and usage. IPC-2221 contains a table that specifies for each
production panel the test coupon placement, quantity (see note) and usage (similar to IPC-D-275 and MIL-STD-275).
NOTE: There needs to be a sufficient number of test coupons on the production panel in order to be able to perform
group A and, when necessary, group B inspection regardless of the number of test coupons specified by the design
standard.
D.4.5
D.4.5 Intended use and intent of this appendix. This appendix can be used to understand the test coupons that
were referenced in previous revisions of this document. These guidelines are intended for the re-identification and
proper usage of test coupons within this document that are, or were originally identified, in various legacy Department
of Defense printed wiring board design standards. This appendix is intended for use in conjunction with a
manufacturer's verification conformance compliancy program.
D.4.5.1
D.4.5.1 Revisions. Printed wiring boards tested to this document generally would meet or exceed the performance
requirements of past revisions. However, due to various changes in acceptability and evaluation criteria, testing
procedures, and test coupon sampling, an exact duplication of a previous revision cannot be claimed or made in all
areas of concern. Manufacturers should not pick-and-choose or mix acceptability requirements or test procedures
from one revision of MIL-PRF-55110 or MIL-P-55110 to another. Compliance should be either to MIL-P-55110C,
MIL-P-55110D, MIL-P-55110E, MIL-PRF-55110E, MIL-PRF-55110F (with a specific amendment, if applicable), or this
document entirely, unless the manufacturer documents a direct correlation between the revisions (with any
amendments, if applicable) under consideration.
D.4.5.2
D.4.5.2 Test coupons, placement, quantity, and usage. IPC-2221 contains a table that specifies for each
production panel the test coupon placement, quantity, and usage (as did IPC-D-275 and MIL-STD-275).
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