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MIL-A-18977D(OS)
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the
contract or purchase order, the supplier is responsible for the performance
of all inspection requirements as specified herein.  Except as otherwise
specified in the contract or order, the supplier may use his own or any
other facilities suitable for the performance of the inspection require-
ments specified herein, unless disapproved by the Government.  The Govern-
ment reserves the right to perform any of the inspections set forth in the
specification where such inspections are deemed necessary to assure sup-
plies and services conform to prescribed requirements.
4.2 Classification of inspections.
Inspection of the amplifier channel
shall be classified as follows:
Preproduction inspection (paragraph 4.4)
(a)
(b)
Quality conformance inspection (paragraph 4.5)
Periodic production inspection (paragraph 4.4)
(c)
4.3 Sampling
4.3.1 Preproduction.  A preproduction sample of five amplifier channels,
manufactured in accordance with 3.2.2, shall be subjected to the preproduc-
tion tests detailed in 4.4 at an activity designated by the procuring activi-
ty.  Acceptance of the preproduction sample shall be based on no defects in
the sample. Further production of the amplifier channel by the supplier,
prior to the approval of the preproduction sample, shall be at the supplier's
risk.
4.3.2 Lot size. Unless otherwise specified in the contract or order,
each shipment of units of product shall be a separate "inspection lot" and
may differ from the quantity specified in the total order or contract. In
any event, all units of a single "inspection lot" shall be made to the same
design, with the same materials and manufacturing techniques, and shall be
part of one continuous production run.
4.3.3 Periodic production samples. From each succeeding lot or grand
lot of 300 or less that have passed the quality conformance inspection of
4.5, a random sample of five amplifier channels will be selected for sub-
mission to an activity designated by the procuring activity to determine
compliance of the samples with the requirements of the contract, specifi-
cation, and drawings.  The amplifier channels shall be considered satis-
factory if they meet all specification and pertinent drawings requirements
and withstand the tests specified in 4.4 and 4.5. Failure of the periodic
production sample to comply with these requirements will result in the
rejection of the lot, as determined by the procuring activity.
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