MIL-DTL-43649D(GL)
in the materials sewed. Thread ends shall be trimmed throughout. Runoffs shall be restitched to
conform to the specified stitch pattern.
3.3.1.1 Stitching, automatic machinery. Automatic sewing machines may be used for
sewing stitch patterns provided that the size of the pattern, the thread size, and the number of
stitches per inch specified in the detail specification are maintained. A minimum of three tie-in,
overlapping or back stitches shall be used to secure the ends.
3.3.1.2 Darns. Holes, cuts, or tears in the canopy, deployment bag or pack cloths shall be
darned with thread, types I, II or III, class A, size A, color Camouflage Green 483 of V-T-295.
Damaged areas of the cloth which can be darned shall not exceed ¼ inch in diameter for holes
(except drill holes) and ½ inch in length for cuts or tears in any direction. Fourteen darns are
allowed per canopy, four per deployment bag, and four per pack.
3.3.2 Canopy Permeability. The air permeability of the cloth of the completed canopy shall
not exceed the specified lower limit by more than 10 percent nor the specified upper limit by
more than 10 percent when tested in accordance with 4.6.1.
3.3.3 Canopy patching. One sewn patch is allowed per canopy. The maximum damaged
area that can be patched is an area 7 inches by 7 inches. The patch shall be located no closer
than 1 inch from a radial seam, edge reinforcement, or lower lateral band. The patch shall be
square or rectangular in shape and conform to the patching procedure in 3.3.4.
3.3.4 Patching procedure.
a. Place the repairable item on a repair table, smooth the fabric around the damaged area,
and secure the item to the table with pushpins. Do not pin the damaged area.
b. Using an authorized marking aid of contrasting color, mark a square or rectangle around
the area to be patched and insure that one side of the marked square or rectangle is parallel to the
warp or filling of the fabric.
c. Cut the damaged area fabric along the lines made in (b) above. Further cut the fabric
diagonally at each corner to allow a ½ inch foldback in the raw edges.
d. Make a ½ inch foldback on each raw edge. Pin and baste each foldback to complete the
prepared hole.
e. Using the same type material as in the original construction, mark and cut a patch 2-1/2
inches wider and longer than the inside measurements of the prepared hole. Insure that the patch
material is marked and cut along the warp or filling of the fabric.
f. Center the patch material over the prepared hole and insure the warp or filling of the patch
material matches the warp or filling of the fabric being patched. Pin the patched material in
position.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business