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|  MIL-C-31239(WP)
4.3
Sampling
4.3.1
Preproduction sample - A preproduction sample of
one (1) Container, manufactured in accordance with 3.1.1 and
3.1.3, shall be subjected to the preproduction tests-detailed in
4.4. Acceptance of the preproduction sample shall be based on
no defects in the sample. Further production of the Container
by the supplier, prior to the approval of the preproduction
sample shall be at the supplier's risk.
4.3.2
Quality conformance inspection sampling - The
sampling plans and procedures set forth in Standard MIL-STD-105
shall be used in the determination of acceptability of the
Containers inspected as specified in 4.5.
4.3.3
Inspection lot - The number of units in an
inspection lot shall be, where practicable, 30 Containers. In
no event will an inspection lot exceed 30 units.
4.4
Preproduction inspection - The preproduction
sample, after satisfactorily passing the examinations of 4.5.2,
shall be subjected to the Rotational Drop Test of 4.4.1.
Certified inspection data covering the results of preproduction
inspections shall be forwarded to the Bureau of Naval Weapons,
if required (see 6.2).
4.4.1
Rotational drop test - Each preproduction sample
shall be subjected to the following test: The loaded Container
shall be supported at one corner of its base on a block six inches
in height. A 12 inch high block shall be placed under the other
corner of the same end of the Container. The lowest point of the
opposite end of the Container shall then be raised to a height
of 24 inches and allowed to fall freely onto a steel or concrete
surface of sufficient mass to absorb the shock without deflection.
This test shall be applied to all four corners of the Container.
Any evidence of structural failure, visible damage, or permanent
deformation to the Container shall be cause for rejection of the
preproduction sample. Minor dents, scratches, or paint flaking
are not cause for rejection.
Quality conformance inspection
4.5
4.5.1
Samples shall be selected using the plans and
procedures set forth in Standard MIL-STD-105, Inspection Level II.
Each Container in the sample shall be examined as required by
4.5.2. An AQL of 2.5 percent for MAJOR Defects and 6.5 percent
for MINOR Defects shall be used.
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