MIL-DTL-13486E
4.6.3 Failure. If a sample fails to pass any periodic control test, the manufacturer shall immediately
notify the qualifying activity and cognizant inspection activity of such failure and 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 and
processes, and which are considered subject to the same failure. Acceptance and shipment of the
product shall be discontinued until a corrective action, acceptable to the qualifying activity has been
taken. After the corrective action has been taken, the periodic control test shall be repeated on additional
samples (all inspections, or the inspection which the original sample failed, at the option of the qualifying
activity). Sampling tests (and periodic control tests, if applicable) may be reinstituted; however, final
acceptance shall be withheld until the periodic control tests have shown that the corrective action was
successful. In the event of failure after inspection, information concerning the failure and corrective
action taken shall be furnished to the cognizant inspection activity and the qualifying activity.
4.7 Methods of inspection.
4.7.1 Materials and construction. Use of proper materials and construction methods shall be
determined by inspection of contractor records providing proof or certification that design, construction,
processing, and materials conform to requirements. Applicable records shall include drawings,
specifications, design data, receiving inspection records, processing and quality control standards,
vendor catalogs and certifications, industry standards, test reports, and rating data.
4.7.2 Examination. The cable shall be examined for proper construction as specified in table VIII.
4.7.3 Concentricity. The maximum and minimum wall thickness of each insulator and the sheath
shall be measured at one end of the test sample. Suitable magnification shall be used if necessary. The
ratio of each minimum wall thickness to the corresponding maximum wall thickness shall also be
computed. (If the cable has two conductors, the sheath measurements shall be omitted.)
4.7.4 Performance.
4.7.4.1 In-process.
4.7.4.1.1 Insulation flaws. Each length of insulated conductor shall be passed through the
suspended chains of the test electrode prior to being assembled into a finished cable. An alternating
current voltage, as specified in table II, shall be applied between the conductor and the test electrode
(chains) so that each point on the insulated conductor surface shall be within a fraction of an inch of at
least one chain for not less than 0.15 second. A length of insulated conductor completely surrounding
each insulation flaw revealed by this procedure shall be removed.
4.7.4.1.1.1 Test electrode. The test electrode shall be an arcing electrode especially designed for
detecting insulation flaws in finished cable and cable components. It shall contain closely spaced bead
chain or fine link mesh, suspended from one end. The chains shall be electrically connected and cover
an area of sufficient dimensions so the entire surface of the cable or insulated conductor is within a
fraction of an inch of at least one chain for the length of time specified in the respective test.
4.7.4.1.2 Finished cable flaws. All finished cable shall be tested as specified herein. The cable
conductors shall be connected electrically. The cable shall be passed through the suspended chains of
the test electrode in the same manner specified for the insulated conductor in 4.7.4.1.1. Each point on
the sheath surface shall be within a fraction of an inch of at least one chain for at least .15 second. While
the cable is passing through the electrode (chains), an alternating current voltage, as specified in table III,
shall be applied between the (uninsulated) conductors and the test electrode. A length of finished cable
completely surrounding each finished cable flaw shall be removed.
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