MIL-DTL-25421C
and 4.4.2.2 respectively, and at the inspection levels and acceptable quality levels
(AQLs) specified therein. The unit of product for determining lot size for these
examinations shall be one plastic sheet or part, as applicable, and the sample unit
shall also be one sheet or part.
4.4.2.1 Examination of sheets or parts for visual defects. This examination
shall be in accordance with Table IV. The inspection level shall be Level I and the
AQL shall be 1.5 defects per 100 units.
TABLE IV. Examination of Sheets or Parts for Visual Defects
Characteristic
Defect
Shape
Not shape specified.
Appearance
Not uniform in translucence or color. Finish not as
specified, not uniform.
Make-up
Not laminated as specified. Laminations gap.
Overlaps less than ½ inch. Made with resin overlay or
thick resin surface.
Foreign Material
Embedded foreign material, surface dirt, parting
material, or other contaminants.
Workmanship
Cracks, scratches holes, blisters, wrinkles, tacky
surface, resin-starved or porous areas, resin pockets,
chipped or broken parts. Rough surfaces, rough
edges. Sheets not flat when required (curvature
exceeds 1/8 inch per foot of length or width). Reverse
curvature, warped or distorted. Sheets delaminated,
unbonded, or containing air pockets. Patches, except
when specifically permitted as allowable defect.
4.4.2.2 Examination of sheets or parts for dimensional defects. The sample
units shall be examined in accordance with Table V. The inspection level shall be
S-3, and the AQL shall be 2.5 defects for 100 units.
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