MIL-PRF-49462C
4.6.2.1.3.3 Disposition of samples. The solderability test is considered a destructive test and samples
submitted to the solderability test shall not be supplied on the contract.
4.6.3 Group B inspection. Group B inspection shall consist of the inspections specified in table VIII in
the order shown. They shall be performed on sample units that have been subjected to and passed the
group A inspection.
TABLE VIII. Group B inspection 1/.
Inspection
Requirement
Method paragraph
paragraph
Resistance temperature characteristic
Dielectric withstanding voltage
Thermal shock
*
1/ If the manufacturer can demonstrate that this test has been performed for five
consecutive times with zero failures, the frequency of this tests, with the approval
of the qualifying activity, can be performed on an annual basis. If the design,
material, construction, or processing of the part is changed, or if there are quality
problems or failures, the qualifying activity may require resumption of the original
test frequency.
4.6.3.1 Sampling plan. Group B tests shall be performed on an inspection lot basis. A sample of 13
parts shall be randomly selected. If one or more defects are found, the lot shall be rescreened and
defects removed. A new sample of 13 parts shall be randomly selected. If one or more defects are found
in this second sample, the lot shall be rejected and shall not be supplied to this specification.
4.7 Periodic inspection. Periodic inspection shall consist of group C inspection. Except where the
results of these inspections show noncompliance with the applicable requirements (see 4.7.1.1.6),
delivery of products which have passed group A and group B inspections shall not be delayed pending
the results of these periodic inspections.
4.7.1 Group C inspection. Group C inspection shall consist of the tests specified in table IX in the
order shown. Group C inspection shall be performed on sample units of each style and selected from
inspection lots which have passed group A and group B inspections. Group C inspection samples shall
be representative of production.
4.7.1.1 Sampling plan.
4.7.1.1.1 Monthly. Every month, 10 sample units of each style, characteristic, and body enclosure of
any resistance value between the critical and lowest values shall be inspected. If none of these
resistance values produced during the month, resistors of the lowest resistance values produced shall be
inspected with one defective units allowed. If this sample fails, 10 additional sample units shall be
inspected with no defectives allowed, but no more than two defectives allowed for all 20 sample units
combined.
4.7.1.1.2 Quarterly. Every 3 month, 20 sample units of each style, characteristic, and body enclosure
of any resistance value between the critical and highest values shall be inspected. Ten sample units of
any resistance value between the critical and highest values shall be subjected to the inspection of
subgroup I, and 10 sample units of the value closest to the value above the critical value shall be
subjected to the inspection of subgroup 2. One defective unit will be allowed for each subgroup, but not
more than one defective for the two groups combined.
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