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|  MIL-G-19027D(OS)
(c) Periodic production inspection (paragraph 4.4)
4.3 Sampling
4.3.1 Preproduction. A preproduction sample of five steering gyros,
manufactured in accordance with 3.2.2, 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 on no
defects in the sample. Further production of the steering gyros 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 con-
tract in a lot for production, shipment, or other purpose. 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 5 steering gyros 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, speci-
fication, and drawings. The steering gyros shall be considered satis-
factory if they meet all specification and pertinent drawings require-
ments and withstand the tests specified in 4.4 and 4.5. Failure of the
periodic production sample to comply with these requirements will re-
sult in the rejection of the lot, as determined by the procuring activ-
ity.
4.4 Preproduction and periodic production inspection. The preproduc-
tion and periodic production samples, after satisfactorily passing the
quality conformance inspections detailed in 4.5, shall be subjected to
the following tests and examinations. Certified inspection data cover-
ing the results of preproduction and periodic production inspections shall
be forwarded to the procuring activity.
4.4.1 Vibration
4.4.1.1 Mounting. The steering gyro, less pack or packaging shall be
mounted rigidly to a vibration device by means of the four mounting holes
shown on Dwg 1873928 and tested as specified in 4.4.1.2 and 4.4.1.3.
4.4.1.2 Vibration, nonoperating. The steering gyro shall be subjected
to the "Vibration, nonoperating" test of MIL-E-82590(OS) and thereafter
shall meet the requirements of 3.4.1.1.
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