MIL-PRF-27639D
ANSI/ASQC Z1.4-1993. The sample size shall be based only on the applicable size code letter
corresponding to inspection level S-3. Each inflator valve selected as a sample unit shall be
forwarded to an inspection activity (see 6.3) selected by the procuring activity for the following
tests as described under 4.7.
a.
Examination of product (see 4.7.1)
b.
Operation test without CO cylinder (see 4.7.2)
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c.
Piercing mechanism operation (see 4.7.3)
d.
Actuator operation (see 4.7.4)
4.4
Inspection conditions
.
4.4.1 Test items. Unless otherwise indicated in the tests methods, all performance,
environmental and test requirements are based on a pneumatic inflation valve complete with
replacable components.
4.4.2 Atmospheric conditions Unless otherwise specified, all tests required by this specification
.
shall be made at an atmospheric pressure of 28 to 32 inches of mercury, a temperature of ± 18
70
degrees Fahrenheit, and a relative humidity of 80 percent or less. If these conditions are not
obtainable, proper corrections shall be made to the tests or the test results to compensate for the
different atmospheric conditions.
4.5
First article inspection If first articles are specified (see 6.2 and 6.4), the first article shall
.
consist of two units. First article inspection may consist of one or more of the described sampling
plans (see 4.3).
4.6
Verification alternatives The pneumatic inflator valve shall meet all performance
.
requirements in section 3. Verification methods indicated in this section are mandated after
contract execution. Alternative test methods, techniques, or equipment, including the application
of statistical process control or cost effective sampling procedures, can be proposed and used
provided that these alternatives offer equal assurance that all product requirements are met. Such
acceptable alternative verification approaches shall be inserted into the contract as negotiated
replacements. In case of dispute as to whether any alternatives provide necessary equal
assurance, the verification provisions as specified apply.
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