MIL-DTL-5589E
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TABLE II. First article inspection.
Inspection
Requirement
Test method
paragraph
paragraph
Group I
4.6.1
3.3, 3.5, and 3.6
Visual and mechanical examination
4.6.2
3.4.1
Frequency response
4.6.3
3.4.2
Impedance
4.6.4
3.4.3
Harmonic distortion
4.6.5
3.4.4
Dielectric withstanding voltage
4.6.6
3.4.5
Stray magnetic field
4.6.7
3.4.6
Endurance
4.6.14
3.4.13
Acoustic quality
Group II
Moisture resistance
3.4.7
4.6.8
Group III
4.6.15
3.2.5
Fungus Resistant
4.6.9
3.4.8
Barometric pressure (reduced)
4.6.10
3.4.9
Thermal shock
4.6.11
3.4.10
Vibration, high frequency
4.6.12
3.4.11
Shock
4.6.13
3.4.12
Salt spray (corrosion)
4.5 Conformance inspection.
4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A and
group B inspections. Except as specified in 4.5.2.1.4, delivery of products which have passed the group
A and group B inspections shall not be delayed pending the results of the group C inspection.
4.5.1.1 Inspection lot. An inspection lot shall consist of all earphones of the same type 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 examinations and tests specified
in table III, in the order shown.
4.5.1.2.1 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. After screening
and removal of defects, a new sample of parts shall be randomly selected in accordance with table
IV. If one or more defects are found in this second sample, the lot shall be rejected and shall not
be supplied to the specification.
TABLE III. Group A Inspection.
Inspection
Requirement
Test method
paragraph
paragraph
4.6.1
Visual and mechanical examination
3.3, 3.5, and 3.6
4.6.2
Frequency response
3.4.1
4.6.3
3.4.2
Impedance
4.6.4
3.4.3
Harmonic distortion
4.6.14
3.4.13
Acoustic quality 1/
1/ This test is to be performed on a 100 percent basis.
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