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 IV.  Classification of defects - ring slot and ribbon parachute canopies - Continued.

   Classification         No.                  Defect                                                                                 Major/Critical     Minor

32.       Pocket band free length

Up to 1/8 inch                                                                                                          224

Over 1/8 inch                                                                                   136

34.       Stitching on canopy

1 stitch per inch over or under the number specified, under 2 inches long and one place per seam (size 3

through 6 thread)                                                                                               226

More than 1 stitch per inch over or under the number

specified (size 3 through 6 thread)                                            138

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

through FF thread)                                                                                             227

More than 2 stitches per inch over or under the number

specified (size E through FF thread)                                         139

Variation in stitches per inch because of change in material thickness

Specified stitches per inch for not more than 3 inches on not more than two places per seam

or not less than 36 inches apart, or both                                                228

Specified stitches per inch for more than 3 inches on more than two places per seam or less than 36

inches apart, or both                                                      140

Broken, skipped, or missing stitches over 1/2 inch in any

one row of 4-needle stitching                                                    141

Open seams                                                                                      142

NOTE:  Seams will be classified as open when one or more stitches joining a seam are broken or where two or more skipped stitches occur.  Repairs of open seams will not be scored as defects.

Missing or incomplete stitch pattern (for example, bartack

or zigzag)                                                                                   143

Backstitch missing                                                                           144

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