MIL-PRF-15733J
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Qualification inspection (see 4.4).
(1) Verification of qualification (see 4.4.4)
b. Conformance inspection (see 4.5).
(1) Group A inspection (see 4.5.1.2)
(2) Periodic group C inspection (see 4.5.2.1)
4.2 Test equipment and inspection facilities. The supplier shall establish and maintain a calibration system in
4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with
the test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202. Unless otherwise specified, the
accuracy of all test voltages, currents, or resistances shall be within 2 percent of that specified.
4.4 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the
Government (see 6.3) on sample units produced with equipment and procedures normally used in production.
4.4.1 Sample size. The number of filters to be subjected to qualification inspection shall be as specified in the
appendix to this specification.
4.4.2 Inspection routine. Samples shall be subjected to the qualification inspection specified in table III, in the
order shown. All specimens shall be subjected to the inspections of group I. The samples shall then be divided into
three groups as specified in table III. The specimens shall then be subjected to the inspections for their particular
group; for alternate-terminal-type submission, each type shall be equally represented in the group.
4.4.3 Failures. Failures in excess of those allowed in table III shall be cause for refusal to grant qualification.
4.4.4 Verification of qualification. Every 12 months, the manufacturer shall provide verification of qualification to
the qualifying activity. The qualifying activity shall establish the initial reporting date. Continuation of qualification
shall be based on meeting the following requirements:
a. Group A inspection requirements
b. Periodic group C inspection requirements
In the event that no production occurred during the reporting period, a report shall be submitted certifying that the
company still has the capabilities and facilities necessary to produce the item. If during two consecutive reporting
periods, there has been no production, the manufacturer may be required, at the discretion of the qualifying activity,
to submit his qualified products to testing in accordance with the qualification inspection requirements.
4.5 Conformance inspection.
4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection.
4.5.1.1 Inspection lot. An inspection lot, as far as practicable, shall consist of all the filters of the same style and
current rating produced under essentially the same conditions and offered for inspection at one time.
4.5.1.2 Group A inspection. Group A inspection shall consist of the tests specified in table IV, performed in the
order shown.
4.5.1.2.1 Sampling plan. A sample of parts shall be randomly selected in accordance with table V. If one or more
defects are found, the lot shall be 100 percent screened for those quality characteristics found defective in the sample
and defects removed. If the total number of seal test defectives exceeds 10 percent of the lot, the lot shall be
rejected and shall not be supplied to this specification. If the total number of seal test defectives is less than 10
percent of the lot, these defectives may be reworked to correct the defects. Visual and mechanical defectives may be
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