MIL-DTL-83729C
3.22 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.23 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin
content of (product) and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3
percent lead, by mass (see 6.5).
3.24 Workmanship. The choppers shall be fabricated in such a manner as to be uniform in quality, and shall be
free from cracked or displaced parts, sharp edges, burrs, and other defects that will affect life, serviceability, and
appearance.
4.
VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows:
(a)
First article inspection (see 4.3).
Inspection of choppers not covered by specification sheets (see 4.4).
(b)
(c)
Conformance inspection (see 4.5).
4.2 Inspection conditions. Unless otherwise specified herein, the test conditions specified in the "GENERAL
REQUIREMENTS" of MIL-STD-202 shall be considered for referee purposes only. All inspections may be performed
at ambient conditions consistent with industry practice.
4.3 First article inspection. Inspection (see 3.2) shall be performed by the supplier after award of contract and
prior to production or delivery at a facility acceptable to the Government. First article inspection shall be performed
on sample units which have been produced with equipment and procedures normally used in production. First article
approval is valid only on the contract or purchase order under which it is granted, unless extended by the
Government to other contracts or purchase orders.
4.3.1 Sample size. Twelve choppers shall be subjected to first article inspection.
4.3.2 Inspection routine. The sample shall be subjected to the inspections in table I, in the order shown, except
that groups II, III, and IV may be conducted concurrently. All sample units shall be subjected to the inspections of
group I. The sample shall then be divided equally into three groups of four units each and subjected to the inspection
for their particular group.
4.3.3 Failures. Failures in excess of those allowed in table I shall be cause for refusal to grant first article
approval.
4.4 Inspection requirements for items not covered by specification sheets. Inspection requirements for items not
covered by specification sheets shall be performed by the supplier, after award of contract, and prior to production, at
a laboratory acceptable to the Government (see 6.2.2). The inspection shall be performed on sample units which
have been produced with equipment and procedures normally used in production. Unless otherwise specified (see
6.2.2), the samples and inspection routine shall be as specified in 4.3.1, 4.3.2, and table I. Approval of inspection
requirements and items not covered by specification sheets is valid only on the contract or purchase order under
which approval is granted, unless extended by the Government to other contracts or purchase orders.
4.5 Conformance inspection. Conformance inspection shall consist of group A inspection.
4.5.1 Inspection of product for delivery. Inspection shall consist of group A inspection.
4.5.1.1 Inspection lot. An inspection lot shall consist of all choppers covered by a single specification sheet,
produced under essentially the same conditions, and offered for inspection at one time.
4.5.1.2 Production lot. A production lot shall consist of all choppers of the same PIN.
4.5.2 Group A inspection. Group A inspection shall consist of the examinations and tests specified in table II, and
shall be made on the same set of sample units. Any of the tests specified in table II which are performed by the
manufacturer as the final steps of this production process need not be repeated as a part of Group A inspection,
provided that such tests and test conditions are clearly identical to, or more stringent than those specified in table II.
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