MIL-STD-849 Inspection Requirements, Definitions And Classification Of Defects For ParachutesThis standard establishes the inspection requirements and a standard classification of manufacturing and final assembly defects for parachutes.

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MIL-STD-849B

TABLE XV. Classification of defects - solid and extended skirt parachute canopies - cargo - Continued.

Classification

No. Defect Major/Critical Minor

Over 360 degrees causing kinks in the line 159

44. Stitching on canopy

1 stitch per inch over or under the number specified, up to

2 inches long and one place per seam (size 3 through

6 thread) 240

1 stitch per inch over or under the number specified, over

2 inches long (size 3 through 6 thread) 160

More than 1 stitch per inch over or under the number of

stitches specified (size 3 through 6 thread) 161

2 stitches per inch over or under the number specified, up to 2 inches long and one place per seam (size B

through FF thread) 241

2 stitches per inch over or under the number specified, over

2 inches long (size B through FF thread) 162

More than 2 stitches per inch over or under number of

stitches specified (size B through FF thread)	163
NOTE: For B or E size thread only, up to 14 stitches
per inch, type 301 or 401 stitches in accordance with
ASTM D 6193, will be allowed for a length not over
2 inches in any one place with a minimum distance
between locations of 12 inches. Over 14 stitches, or
14 stitches more than 2 inches long or less than
12 inches apart, shall be classified a major defect.
NOTE: When a double thickness or more occurs in
fabric being sewn or where pressure must be applied by
an operator to sew over reinforcement tapes and
webbings, the number of stitches per inch defects will
be classified as follows: within the major defect
category, minor defect; and within the minor defect
category, no defect.
NOTE: When the end item specification forbids repair to
defective stitching, it shall be classified as a major defect.
Broken or missing stitches
Up to 1/2 inch		242
Over 1/2 inch	164
2 or more consecutive skipped stitches	165
Missing or incomplete stitch pattern (for example, bartack
or zigzag)	166
Backstitch missing	167
Backstitch short