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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No.

Defect

Major/Critical

Minor

Up to 1 percent

Over 1 percent

150

232

36.

Twisted suspension line between vent and skirt (flat) In channel, up to 360 degrees

In channel, over 360 degrees

151

233

37.

Twisted suspension line between vent and skirt (core or coreless braid)

In channel, 720 degrees

234

In channel, any twist causing kinks in line

152

38.

Twist between line reinforcement at skirt and 3-inch zigzag

stitching above when suspension lines are continuous through

canopy (measured by pulling line under 5 pounds of tension

between vent and line reinforcement and observing the rotation of

zigzag stitching)

90 to 180 degrees

235

Over 180 degrees

153

Line not placed between 2 plys of material

154

39.

Variation in suspension line length between skirt and attaching

point

Up to 1 percent

236

Over 1 percent

155

40.

Variation in suspension line length per set between skirt and attaching point

Up to 1/2 percent

237

Over 1/2 percent

156

41.

Twisted suspension line between skirt and attaching point (flat), except hem rigged canopy

157

42.

Twisted suspension line (flat), hem rigged canopy

180 to 360 degrees

Over 360 degrees

158

238

43.

Twisted suspension line between skirt and attaching point, core and coreless braid

Over 360 degrees

239