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| MIL-F-51539A
required, the contractor shall demonstrate that the effectiveness of each proposed alterna-
tive is equal to or better than the quality assurance provisions specified herein. In cases of
dispute as to whether the contractor's proposed alternative provides equal quality assur-
ance, the provisions of this specification shall apply. All approved alternative inspection
provisions shall be specifically incorporated into the contractor's quality program or de-
tailed inspection system, as applicable.
The inspection requirements specified herein are
4.2 Classification of inspections.
classified as follows:
(a) First article inspection (see 4.3)
(b) Quality conformance inspection (see 4.4)
4.3 First article inspection.
4.3.1 Inspections to be performed. As determined by the Government, the first article
sample items shall be examined and tested in accordance with this specification using either
the first article procedures in this specification or other first article procedures which will be
provided by the Government. As determined by the Government, the sample first article
items may be subjected to any or all of the examinations and tests specified in this specifi-
cation and be inspected for compliance with any or all of the requirements of the applicable
drawings and special packaging instructions.
4.3.2 Sample. The first article sample shall consist of five filter units manufactured and
packaged (when applicable) using the same methods, materials, equipment, and proc-
esses as will be used during regular production. The first article sample shall be submitted
for inspection and approval in accordance with the terms of the contract.
4.3.3 Inspection procedures. The first article sample of filter units shall be examined
and tested for compliance with all the requirements of the applicable drawings, and sections
3 and 5 of this specification except for requirement 3.5.
4.3.4 Acceptance criteria. If any first article sample item fails to comply with any of
the applicable requirements, the first article sample shall be rejected. The Government
reserves the right to terminate inspection upon any failure to comply with any of the re-
quirements. The contractor shall obtain written approval from the contracting activity prior
to proceeding with regular production.
4.4 Quality conformance inspection.
4.4.1 Lotting. A lot shall consist of the items produced by one manufacturer, at one
plant, from the same materials, under essentially the same manufacturing conditions, and
at essentially the same time.
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