MIL-DTL-25421C
4.4.3.1 concerning preparation of laminate test specimens when required shall
be applicable to the first article sample, also.
4.2.2 First article inspection in repeat orders. In repeat orders or orders for
different parts, the requirement for first article inspection in this specification may be
met by analysis of applicable test data from previous first article testing, provided the
materials and processes have not been changed. However, the performance of any
first article test or examination may be required to assure the conformance of the
material to the specification requirements.
4.3 Quality conformance inspection. Quality conformance inspection shall
include the examination of sheets or parts for visual and dimensional defects (4.4.2,
tests of the sheets or parts for conformity to physical, mechanical, and electrical
requirements (4.4.3), and examination of preparation for delivery (4.4.4).
4.3.1 Sampling for quality conformance inspection. Sampling for quality
conformance inspection shall be performed in accordance with MIL-STD-1916 or
ANSI/ASQ Z1.4 for the inspection level and acceptability quality level (AQL)
prescribed under the applicable examination or test. The following definitions shall
apply:
4.3.1.1 Lot. For purposes of quality conformance sampling, a lot shall consist
of all laminated materials of the same type, class, glass fiber base, and part number
subjected to inspection at one time.
4.3.1.2 Unit of product. The unit of product for determining lot size for quality
conformance sampling shall be as specified in the respective examination or test
paragraphs. The sample units shall also be as specified in these paragraphs.
4.3.3 Rejection criteria. The acceptability quality levels (AQLs) in this
specification are expressed in effects per 100 units in accordance with MIL-STD-
1916 or ANSI/ASQ Z1.4. If, in any of the specified quality conformance examinations
and tests, the number of defects in the sample units exceeds the MIL-STD-1916 or
ANSI/ASQ Z1.4 acceptance number for the applicable AQL, the lot represented by
the samples shall be rejected. The disposition of rejected lots shall be in accordance
with MIL-STD-1916 or ANSI/ASQ Z1.4.
4.4 Examinations and tests.
4.4.1 Examination and tests of component materials (first article inspection
only). The cloth, mat, resin or filler components which are to be used in the
laminated plastic materials shall be inspected for conformity to 3.3 and the applicable
referenced specifications.
4.4.2 Examination of sheets or parts. As examination of the sheets or parts for
visual defects and for dimensional defects shall be made in accordance with 4.4.2.1
9
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business