MIL-DTL-21604F
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows:
a.
Materials inspection (see 4.3).
b.
Qualification inspection (see 4.5).
Conformance inspection (see 4.7).
c.
4.2 Test equipment and inspection facilities. The manufacturer shall establish and maintain a calibration system in
accordance with ISO 10012-1, or equivalent system as approved by the qualifying activity.
4.3 Materials inspection. Materials inspection shall ensure that the materials listed in table I, used in fabricating
the switches, are in accordance with the applicable referenced specifications or requirements prior to such
fabrication. Failure to comply with the above requirements shall constitute rejection of all affected lots.
4.4 Inspection conditions. Unless otherwise specified herein, inspections shall be performed in accordance with
the test conditions specified in the "GENERAL REQUIREMENTS" section of MIL-STD-202.
4.5 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.
4.5.1 Samples for qualification. Six sample switches for qualification shall be selected in accordance with the
detail specification sheet (see 3.1). The test to be performed and the test sequence shall be in accordance with table
4.5.2 Retention of qualification. Every 12 months, the manufacturer shall provide verification of qualification to the
qualifying activity. In addition, the manufacturer shall immediately notify the qualifying activity whenever the group B
inspection results indicate failures of the qualified product to meet the requirements of this specification. Verification
shall be based on meeting the following requirements:
a.
Design of switch has not been modified (every 12 months).
Verification of group A lot acceptance (every 12 months) (see 4.7.1.2).
b.
c.
Periodic group B inspection (every 24 months) (see 4.7.1.4).
At three-year intervals, a summary of results of group C test shall be forwarded. Group B and group C test reports
shall be forwarded to the qualifying activity and shall include copies of original data sheets. Each summary and test
report shall be validated by the Government quality assurance representative. If the test results indicate
nonconformance with specification requirements, requalification will be required unless proof of corrective action for
each failure is provided. Failure to submit the summaries will result in loss of qualification for that product. In addition
to the periodic submission of inspection data, the suppliers shall immediately notify the qualifying activity at any time
during the intervals that inspection data indicates failure of the qualified product to meet the requirements of the
specification. In case there is no production during the intervals, a statement to this effect shall be forwarded to the
qualifying activity.
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