MIL-PRF-81F
4.5.3 Noncompliance. If a sample fails to pass group C inspection, the manufacturer shall 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 are manufactured with essentially
the same materials and under the same processes, and which are considered subject to the same failure.
Acceptance and shipment of the product shall be discontinued until corrective action acceptable to the qualifying
activity has been taken. After the corrective action has been taken, group C inspection shall be repeated on
additional sample units (all inspections, or the inspection which the original sample failed, at the option of the
qualifying activity). Group A and group B inspections may be re-instituted; however, final acceptance and shipment
shall be withheld until the group C inspection has shown that the corrective action was successful.
4.5.4 Verification of qualification. Every 6 months, the manufacturer shall provide verification of qualification to
the qualification activity. Continuation of qualification shall be based on meeting the following requirements:
a.
The capacitor design has not been modified.
b.
Lot rejection for group A inspection does not exceed the group A sampling plan.
c.
The requirements for group B have been met.
d.
Periodic group C inspection.
4.6 Methods of inspection.
4.6.1 Visual and mechanical examination. Capacitors shall be examined to verify that the materials, design,
construction, physical dimension, marking, and workmanship are in accordance with the applicable requirements
4.6.2 Dielectric withstanding voltage (see 3.5).
4.6.2.1 Terminal to terminal. Capacitors shall be tested in accordance with method 301 of MIL-STD-202. The
following details shall apply.
a.
Magnitude of test voltage: 2.2 times applicable rated dc voltage.
b.
Duration of application of test voltage: 3 seconds ±2 seconds.
c.
Points of application of test voltage: Between terminals.
d.
Limiting value of surge current: 50 milliamps.
4.6.2.2 Terminal to mounting. Capacitors shall be tested in accordance with 4.6.2.1 with the following exceptions.
a.
Capacitors shall be mounted by normal mounting means on a metal plate and the terminals shall be
electrically connected. (Resilient spacer referenced in 6.5 shall not be used for this test.)
b.
In lieu of 4.6.2.1c use the points of application of test voltage: Between terminals and metal plate.
c.
Style CV31 does not require this test.
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