MILDTL28803C
4.4.3 Failures. One or more failures shall be cause for refusal to grant qualification approval.
4.4.4 Extent of qualification.
4.4.4.1 Single submission. Qualification shall be restricted to the type submitted.
4.4.4.2 Group submission. The extent of qualification shall be in accordance with the applicable specification
sheet (see 3.1).
4.4.5 Retention of qualification. To retain qualification, the supplier shall forward a report at 36-month intervals to
the qualifying activity. The qualifying activity shall establish the initial reporting date. 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.
The results of tests performed for qualification verification inspection, group B, including the number and
mode of failures. If the test results indicate nonconformance with specification requirements, and corrective
action acceptable to the qualifying activity has not been taken, action shall be taken to remove the failing
product from the QPL.
Failure to submit the report within 30 days after the end of each 36-month period may result in loss of qualification for
the product. In addition to the periodic submission of inspection data, the supplier shall immediately notify the
qualifying activity at any time that the inspection data indicates noncompliance of the product to meet the
requirements of this specification.
4.5 Conformance inspection.
4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group inspection except
as specified in 4.5.2.1.3. Delivery of products which have passed the group A inspection shall not be delayed
pending the results of the group B inspection.
4.5.1.1 Inspection lot. An inspection lot shall consist of all displays of the same specification sheet of the same
enclosure design, temperature characteristic, vibration grade, shock type, and design and construction, produced
under essentially the same conditions, and offered for inspection at one time. Similar displays conforming to these
requirements but having different circuitry may be combined to form a lot.
4.5.1.2 Group A inspection. Group A inspection shall consist of the examinations and tests specified in table III in
the order shown.
4.5.1.2.1 Rejected lots. If an inspection lot is rejected, the supplier may rework it to correct the defects, or screen
out the defective units, and resubmit for reinspection. Resubmitted lots shall be inspected using tightened inspection.
Such lots shall be separate from new lots, and shall be clearly identified as reinspected lots.
TABLE III. Group A inspection.
Sample plan
Examination or test
Requirement
Method
Major
Minor
Visual and mechanical examination
n = 45, c = 0
n = 22, c = 0
Operating characteristics
n = 45, c = 0
Character distortion
n = 45, c = 0
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