MIL-DTL-3661D
4.5 Conformance inspection. Conformance inspection shall consist of groups A and B, and group C
inspection, as applicable, as specified in 4.5.1 through 4.5.4.1.1.
4.5.1 Inspection lot. An inspection lot, far as practicable as, shall consist of all lampholders,
indicator-light housings, lenses, or indicator lights shown on the same specification sheet, produced under
essentially the same conditions and offered for inspection at one time.
4.5.2 Group A inspection. Group A inspection shall consist of the examination and tests specified in
Table V, in the order shown.
4.5.2.1 Sampling plan. Statistical sampling and inspection shall be in accordance with MIL-STD-1916 for
ordinary inspection.
TABLE V. Group A inspection.
Examination and tests
Requirement paragraph
Method paragraph
Visual and mechanical examination
Contact resistance
Circuit continuity (Units with
non-replaceable lenses)
Dielectric withstanding voltage
1
As applicable.
2
When specified (see 3.2).
4.5.3 Group B inspection. Group B inspection shall consist of a sealing test as required by 3.5.10 and
performed in accordance with 4.6.11. This test shall be performed every six months, utilizing 12 samples chosen at
random from a current lot of material. No failures shall be allowed for group B inspection.
4.5.3.1 Disposition of group B sample units. Sample units subjected to group B inspection may be
delivered as a part of the lot under the contract or order.
4.5.4 Group C inspection. Group C inspection shall consist of the tests specified in table VI, in the order
shown. The sampling shall be as specified in 4.5.4.1. No failures shall be allowed for group C inspection except for
non-removable units as defined in 4.4.3.2. Shipment of lots will not be held up pending completion of group C
inspection.
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