MIL-DTL-13253E
TABLE II. First article Inspection.
Examination or test
Requirement
Method paragraph
paragraphs
Group I
Visual and mechanical
Dielectric withstanding voltage
Frequency response 1/
Earphone
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Microphone
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Impedance (earphone)
Resistance (microphone)
Operational (talk)
Group II
Vibration 1/
Moisture resistance 1/
Group III
Random drop 1/
Temperature cycling 1/
Group IV
Switch test
1/ Earphones and microphones shall meet the requirements of MIL-M-13189 after
subjection to environmental tests.
4.6 Conformance inspection.
4.6.1 Inspection of product for delivery. Inspection of product for delivery shall consist of groups A and
B inspections. Except as specified in 4.6.1.4.4, delivery of products, which have passed groups A and B
inspections, shall not be delayed pending the results of group C inspection.
4.6.1.1 Inspection lot. An inspection lot shall consist of all handsets of the same type, produced under
essentially the same conditions, and offered for inspection at one time.
4.6.1.2 Group A inspection. Group A inspection shall consist of the examination and tests specified in
table III, in the order shown.
4.6.1.2.1 Sampling plan. A sample of parts shall be randomly selected in accordance with table IV. If
one or more defects are found, the lot shall be rescreened and defects removed.
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