MIL-PRF-20M
4.5.1 Verification of qualification (non-ER styles). To retain qualification, the supplier shall forward a report at 6-
month intervals to the qualifying activity. The qualifying activity shall establish the initial reporting date. Retention of
qualification of an ER style will also retain qualification of corresponding non-ER style (for example, CCR75 and
CC75). The report shall consist of:
a. A summary of the results of the tests performed for inspection of product for delivery (group A), indicating as a
minimum the number of lots that have passed and the number that have failed. The results of tests of all
reworked lots shall be identified and accounted for.
b. A summary of the results of tests performed for periodic inspection (group B), including the number and mode
of failures. The summary shall include results of all periodic inspection tests performed and completed during
the 6-month period. If the summary of the test results indicates nonconformance with specification
requirements, and corrective action acceptable to the qualifying activity has not been taken, action may be
taken to remove the failing product from the qualified products list.
Failure to submit the report within 30 days after the end of each 6 month period may result in loss of qualification for
the product. In addition to the periodic report, the supplier shall immediately notify the qualifying activity at any time
during the 6 month period that the inspection data indicates failure of the qualified product to meet the requirements
of this specification.
In the event that no production occurred during the reporting period, a report shall be submitted certifying that the
company still has the capabilities and facilities necessary to produce the item. If during 3 consecutive reporting
periods there has been no production, the manufacturer may be required, at the discretion of the qualifying activity, to
submit the products to testing in accordance with the qualification inspection requirements.
4.6 Conformance inspection.
4.6.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection.
4.6.1.1 Inspection and production lot.
4.6.1.1.1 Inspection lot. An inspection lot shall consist of all capacitors of one or more styles, produced under
essentially the same conditions and offered for inspection at the same time. ER parts shall be produced separately
from non-ER parts. The sample from the lot shall be representative of the styles in the lot. The following styles are
considered to be of similar style and may be combined:
Group
Style
1
CCR05, CCR06, CCR07, CCR08, and CCR09
2
CCR75, CCR76, CCR77, CCR78, and CCR79.
3
All styles inactive for new design may be combined.
4.6.1.1.2 Production lot. A production lot shall consist of all capacitors of the same style, voltage rating, nominal
capacitance value, and voltage-temperature characteristic. The manufacture of all parts in the lot shall have been
started, processed, assembled, and tested as a group. Lot identity shall be maintained throughout the manufacturing
cycle.
4.6.1.2 Group A inspection. Group A inspection shall consist of the inspections specified in table V or table VII.
Subgroup 1 and subgroup 2 shall be done in the order shown. Subgroup 3 and subgroup 4 in table V may be done at
any time after subgroup 1.
4.6.1.2.1 ER capacitors.
4.6.1.2.1.1 Subgroup 1 tests. Subgroup 1 tests shall be performed on 100 percent of the product supplied under
this specification. Capacitors failing the tests of subgroup 1 shall be removed from the lot. Production lots exceeding
the 5 percent defective allowable (PDA) shall be segregated from new lots and lots that have passed inspection.
Production lots exceeding 15 percent PDA shall be rejected and shall not be resubmitted for reinspection.
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