MIL-DTL-55353A
4.4.1.3.3 Disposition of sample units. Sample units which have passed the group B inspection may be delivered
on the contract or order if the lot is accepted and the sample units are still within specified electrical tolerances.
4.4.1.4 Group C inspection. Group C inspection shall consist of the tests specified in table III, in the order
shown. Group C inspection shall be made on sample units selected from inspection lots, which have passed group
A and group B inspections.
4.4.1.4.1Sampling plan. Group C inspection shall be performed once each month on six sample units selected
without regard to their quality from units produced during that period or each 1,000 units, whichever occurs first.
The sample shall be divided equally into two groups and subjected to the tests of subgroup 1 and subgroup 2 of
table III.
TABLE III. Group C inspection.
Test
Requirement
Method
paragraph
paragraph
Subgroup 1 (3 sample units)
3.3.4
4.5.5
Random drop
Subgroup 2 (3 sample units)
Salt spray (corrosion)
3.3.5
4.5.6
4.4.1.4.2 Failures. If one or more sample units fail to pass group C inspection, the sample shall be considered
to have failed.
4.4.1.4.3 Disposition of sample units. Sample units which have been subjected to group C inspection shall not
be delivered on the contract or order.
4.4.1.4.4 Noncompliance. If a sample fails to pass group C inspection, the supplier shall take corrective action
on the materials or processes, or both, as warranted, and on all units of product which can be corrected and which
were manufactured under essentially the same conditions, with essentially the same materials, processes, etc., and
which are considered subject to the same failure. Acceptance of the product shall be discontinued until corrective
action, acceptable to the Government, has been taken. After the corrective action has been taken, group C
inspection shall be repeated on additional sample units (all inspection, or the inspection which the original sample
failed, at the option of the Government). Group A and group B inspections may be reinstituted; however, final
acceptance shall be withheld until the group C reinspection has shown that the corrective action was successful. In
the event of failure after reinspection, information concerning the failure and corrective action taken shall be
furnished to the cognizant inspection activity and the qualifying activity.
4.5 Method of inspection and test.
4.5.1 Visual and mechanical inspection. Headsets shall be inspected to verify that the materials, design,
construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements
(see 3.1, 3.2, 3.4, and 3.5). Defects shall be classified as specified in table IV.
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