MIL-DTL-3950J
4.7.3 Retention of qualification. To retain qualification, the supplier shall forward to the qualifying
activity via Government quality assurance representative at yearly intervals, summaries of group A
inspection for that period, along with group B test reports, when applicable. The summary of group A
inspections shall indicate as a minimum the number of inspection lots which have passed and the number
which failed (including the number and type of any part failures, the reason for failure, the corrective
action taken and how the lot was reexamined). The group B test report shall cover the actual tests
performed. If the results for group B tests indicate nonconformance with the specification requirements,
action shall be taken to remove the failing products from the qualified products list. Failure to submit the
summary shall result in loss of qualification for that product. In the event that no production occurred
during the reporting period, a report shall be submitted certifying that the company still has the
capabilities and facilities necessary to produce the item.
4.8 Methods of examination and test.
4.8.1 Examination of product. Switches shall be examined to verify that the interface and physical
dimensions, marking, and workmanship are in accordance with the applicable requirements. Only two of
the sample units shall be inspected for compliance with physical dimensions. This inspection shall be
4.8.2 Solderability (applicable to solderable terminals, see 3.6.1). Switches shall be tested in
accordance with method 208 of MIL-STD-202. The following details and exceptions shall apply:
a. Number of terminals to be tested - A minimum of one terminal of a closed contact per switch.
b. Depth of immersion in molten solder - Terminals shall be immersed to the maximum extent
possible.
c.
Examination of terminals - Method for evaluation of lugs and tabs shall apply.
d. Dipping machine - Need not be used.
4.8.3 Resistance to soldering heat (applicable to solderable terminals) (see 3.6.2). Switches shall be
tested in accordance with method 210 of MIL-STD-202. The following details shall apply:
a. Number of terminals to be tested - A minimum of one terminal of a closed contact per switch.
b. Depth of immersion in molten solder - Terminals shall be immersed to the maximum extent
possible.
c.
Test condition letter - B.
d. Cooling time prior to final examinations and measurements - not applicable.
e. Examinations and measurements:
Before - None.
After - Switches shall be operable and there shall be no
internal deformation or other damage when opened at the
conclusion of the test sequence.
4.8.4 Switching characteristics (see 3.6.3). Switching action (e.g., on-off, on-off-on, etc.) and circuitry
shall be inspected for compliance with the applicable requirements (see 3.1). Circuit continuity shall be
inspected using a 6-volt source with a maximum load of 100 milliamperes.
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