MIL-PRF-15160K
4.4.4 Verification of qualification. To retain qualification, the manufacturer shall provide verification to the
qualifying activity for the following items at 36-month intervals:
a.
Design of the fuses has not changed.
b.
Verification that the conformance inspections have been performed on inspection lots supplied to the
requirements of this specification (groups A and B).
c.
Verification that the periodic inspection, (group C), has been performed as applicable. If there is an
indication of 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 provide verification of the product within 30 days after the end of each 36-month period may result in loss of
qualification for the product. The contractor shall immediately notify the qualifying activity at any time during the 36-
month period that verification indicates failure of the qualified product to meet the requirements of this specification.
In the event that no production occurred during the reporting period, the contractor shall verify to the qualifying activity
that the capability to manufacturer and test QPL fuses still exists and that the contractor wants to remain on the QPL.
If during two consecutive reporting periods there has been no production, the manufacturer may be required, at the
discretion of the qualifying activity, to submit a representative product of each style, voltage rating, and current rating
to testing in accordance with the qualification inspection requirements.
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
4.5.1.1 Inspection lot. An inspection lot shall consist of all fuses of the same style, current rating, characteristic,
and voltage reproduced 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 inspection and tests specified in table IV.
TABLE IV. Group A inspection.
Inspection
Requirement
Test method
Visual and mechanical examination
Continuity 1/
Resistance 2/
1/ Not required when resistance is conducted.
2/ When specified (see 3.1).
4.5.1.2.1 Sampling plan. Group A inspection shall be on an inspection lot basis. Samples shall be selected in
accordance with table V, based on the inspection lot. If there are one or more failures, the inspection lot shall be
considered to have failed.
4.5.1.2.2 Rejected lots. If an inspection lot is rejected, the supplier may rework it to correct the defects or 100
percent inspect the lot and remove all defective parts. Reworked lots shall be resubmitted for inspection. Such lots
shall be separated from new lots and shall be clearly identified as reinspected lots. If one or more defects are found
in this second sample, the lot shall be rejected and shall not be supplied to this specification.
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