MIL-DTL-9419G
4.6.2.2 Noncompliance. If a sample fails to pass group C inspection, the manufacturer shall notify the
qualifying activity and the 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 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
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 tests and examinations,
or the test which the original sample failed, at the option of the qualifying activity). Groups A and B
inspections may be reinstituted; however, final acceptance and shipment shall be withheld until the group
C inspection has shown that the corrective action was successful. In the event of failure after
reinspection, information concerning the failure shall be furnished to the cognizant inspection activity and
the qualifying activity.
4.7 Methods of examination and test.
4.7.1 Visual and mechanical examination. Switches shall be examined to verify that the design,
construction, physical dimensions, marking, and workmanship are in accordance with the applicable
requirements (see 3.1).
4.7.2 Switching characteristics. Each switch shall be cycled by hand five times through all positions,
while carrying the rated inductive load. The test fixture shall have suitable provisions to show that the
proper circuit is being closed and opened. The switch shall return to the center off position upon removal
of the external actuating force.
4.7.3 Actuating force (see 3.5.1). The switch shall be horizontally mounted by its normal mounting
means with the actuating mast in the horizontal plane and with a stationary contact down. Weight shall
be hung on the cap. For group A inspection a suitable spring loaded fixture may be used. Unless
otherwise specified (see 3.1), the switch shall actuate between 21 and 36 ounces and there shall be no
short circuiting, breakage or damage to the switch. All four switch positions shall be measured.
4.7.4 Actuating lever travel (see 3.5.2). Switches shall be tested in a suitable fixture with an accuracy
of at least .25 degree. The actuating lever travel of 3 degrees to 7 degrees shall be required to make
contact in each position and a minimum of 2 degrees overtravel shall be required beyond the point of
contact make. On the return stroke there shall be a minimum of 2 degrees of lever travel between the
point of breaking contact and the center off position. The differential between the point of make or break
of the contacts and the snap feel shall not exceed .25 degree for any one of the four directions of travel.
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