MIL-DTL-24646B
4.3 First article inspection. First article inspection shall be performed on sample units which have been produced
with equipment and procedures normally used in production. The manufacturer shall provide verification to the
procuring activity that the first article inspection has been performed on the samples supplied to the requirements of
this specification. Acceptance will be allowed for all fuse and fused distribution box sizes of the category submitted
(see 4.3.1) up to and including the maximum size tested and accepted. Fuse box sizes will be determined by the
number of circuits in the box.
4.3.1 Sample size. One fuse box of each symbol number (covered by a single specification sheet (see 3.1)) shall
be subjected to first article inspection.
4.3.2 Inspection routine. The sample shall be subjected to the inspections as specified in table I.
4.3.3 Failure. One or more failures of first article examination or tests shall be cause for rejection.
TABLE I. First article inspection.
Requirement
Test
Inspection
paragraph
paragraph
Visual and dimensional examination
and 3.9
Pull-test
Dielectric withstanding voltage
Insulation resistance
Operation
Temperature rise
Salt atmosphere
Effectiveness of enclosure
Vibration
Shock
Magnetic permeability
(where applicable)
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