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|  MIL-S-71146 (AR)
4.4.5.3 Cold temperature. Beginning with the first lot
produced and continuing until three (3) consecutive losts have
complied with the acceptance criteria of 4.4.2.9, fifty (50)
simulator assemblies shall be selected from each lot for test.
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After three (3) consecutive lots have met the acceptance criteria of
4.4.2.9, thirty-two (32) simulators shall be selected from each lot
for this test. The lot shall be rejected if three (3) or more major
functioning defects occur, and lot sampling shall revert to fifty
(50) samples per lot in accordance with 4.4.2.9.
4.5 Methods of inspection.
4.5.1 Dimensional control of molded or plastic parts. In place
of normal samplinq and inspections associated with the
classification of defects, and after a curing time for the parts has
been approved (see note 1) a sample of three (3) Parts (as molded)
from each cavity shall be fully inspected dimensionally to qualify a
new or reworked cavity for use in production. The molded parts
shall carry the individual cavity identification. As a control of
each cavity during production, the above quantity of parts from each
cavity shall be inspected for a least the defects listed in 4.4.2.1,
4.4.2.4 and 4.4.2.7 after continuous production of each 5,000 parts
or at the end of each week, whichever occurs first. Of the three
(3) samples, one (1) sample shall be the last part produced. If any
defective parts are found when inspection is performed for the
control of the cavity, the cavity producing the defective part shall
be removed from production. Further, that portion of production
since the last control check shall be returned to the contractor for
inspection for each separate type of defect. All cavities removed
from production because of some fault, may, after reworking be
returned to production providing they pass the qualification test
above. The contractor may request a change of inspection frequency
providing he presents objective evidence to the contracting Officer
to substantiate the request. Contractor design of gages and test
equipment required to perform the inspections listed herein shall be
submitted per 6.3 for approval prior to manufacture of equipment.
The noted subparagraphs identify those items and minimum inspections
subject to the requirements of the paragraph.
NOTE 1: In establishing a curing time, dimensionally check ten (10)
parts from each cavity at periodic intervals (e.g. every 30, 60,
etc. reins.) until dimensional stability is attained. The curing
time will be from the time the part comes out of the mold until
dimensional stability is attained. The inspection data used in
determining the curing time shall be sent to the technical agency
specified in the contract. If there is a change in material, or in
the cycle time, or if a cavity is reworked, or a new cavity is used,
a new curing time shall be established and approved.
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