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|  MIL-T-81148B(OS)
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 transformer shall
be classified as follows:
(a) Preproduction inspection (paragraph 4.4)
(b) Quality conformance inspection (paragraph 4.5)
(c) Periodic production inspection (paragraph 4.4)
4.3 Sampling
4.3.1 Preproduction.
A preproduction sample of five transformers,
manufactured in accordance with 3.2.1, shall be subjected to the prepro-
duction tests detailed in 4.4 at an activity designated by the procuring
activity. Acceptance of the preproduction sample shall be based cm no
defects in the sample. Further production of the transformers by the
supplier, prior to 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 shipments 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 samp les. From each succeeding lot or grand
lot of 300 or less that have passed the quality conformance inspection of
4.5, a sample shall be selected in accordance with MIL-STD-105 Inspection
Level S-2 for submission to an activity designated by the procuring activity
to determine compliance of the sample with the requirements of the contract,
specification, and drawings. The transformers 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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