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M]. Repair complete.
2.5 SINGLE-SIDE FABRIC PATCHES. For most fabric patches on a container panel, there is
not enough area to perform a proper French fell seam patch. Consequently, the single-side
patch is the most common technique used. By using matching fabric and thread, a large damaged
area may be covered to affect the necessary repair. While called a single-side patch, in
effect it is an enlarged version of the overlay patch. A smaller piece of webbing or fabric is
used to cover the damaged area on the inside and the outside is covered with the single-side
patch. This technique is used where there may be large holes or widespread damage and
replacement of the panel not practical.
2.5.1 Duplicate steps 2.4.1 thru 2.4.5 but substitute webbing for the inside patch and use container
fabric for the outside patch.
2.5.2 Fold the edges of the outside patch under a minimum of .5". Stitch around the perimeter
approximately .12" from the edge. Run a second row of stitches approximately .25" inside
and parallel to the first. [Figure N] This will give added strength to the patch and an appearance
of a French fell seam patch. Repair complete.
3.0 INSPECTION:
3.1 Check thread tensions, stitches per inch, and overstitch lengths.
3.2 Damaged area must be covered completely.
3.3 For the overlay and single-side patches, make sure the stitch patterns catch both sides of the
patch materials completely.
7-44
7-45
Parachute Repair Procedure
TITLE: 7.2.2 Container Grommet Replacement
NUMBER OF PAGES: 2
APPLICABLE PRODUCTS: All types of containers that use grommets.
DESCRIPTION: Replacement of damaged grommets of all types.
AUTHORIZED REPAIRMEN: FAA Senior or Master Parachute Rigger
MATERIALS: E thread—color to match
Grommets—size, type, and material to match
MACHINES: 301 Straight stitch—Medium Duty 7-11 SPI
308 Zigzag—Medium Duty 7-11 SPI
EQUIPMENT:
Scissors
Seam ripper or scalpel
Marking pencil
6" ruler
Grommet die set—Size to match grommets
Leather mallet
Grommet cutting board
Hole punch to match grommet size
Basting tip (optional)
Diagonal wire cutters—8" minimum
PROCEDURE
Note: There are many types of grommets used in parachute container manufacture. Older style
military surplus containers used flat grommets made of brass with a chrome finish, which were
designed to work with cones. Most modern container systems use rolled rim spur grommets and
washers. The most common size is the “O.” For many years, regular brass grommets were used and
then nickel plated ones became the norm. In recent years, stainless steel has come to be the preferred
type due to the ability to resist deformation and corrosion. Today, there are two types of “O” stainless
grommets. The first is the regular or “short shank.” Recently, a long shank version has become
available. It has proven to be very versatile and popular. This repair procedure will focus primarily
on the “O” spur grommet and washer, but the technique can be applied to all types of grommets.
1.0 DISASSEMBLY:
1.1 GROMMET REPLACEMENT. This is
for replacing a damaged grommet or
changing from brass to stainless steel.
1.2 Use the cutters to remove the grommet.
If the grommet is set into a fabric/webbing
base, fold the material back to
expose the washer. Using the diagonal
cutter, cut through the washer [Figure A]
and then peel it back from the grommet
[Figure B]. Grasp the grommet and peel
it from the material.
7-46
2.0 REASSEMBLY:
2.1 GROMMET REPLACEMENT. If the hole is intact and undamaged, simply insert the
replacement grommet into the material from the correct side, and set with the grommet die.
Make sure that the grommet is set sufficiently so that there is no exposed edge to snag lines
or material.
2.2 MATERIAL REPAIR AND GROMMET REPLACEMENT. If, after removing the grommet,
the fabric is damaged so that the grommet cannot be set properly, use the zigzag machine to
stitch around the perimeter of the hole, reducing its size [Figure C].
2.2.1 Take the basting tip and pass it through the hole, searing the material [Figure D]. This will
solidify the frayed and raw edge of the damaged material.
2.2.2 Set the grommet in the repaired hole [Figure E].
3.0 INSPECTION:
3.1 Check the grommet orientation.
3.2 Grommet must be set tightly.
3.3 There should be no sharp edges on inside of grommet.
7-47
Parachute Repair Procedure
TITLE: 7.2.3 Container Velcro® Replacement
NUMBER OF PAGES: 2
APPLICABLE PRODUCTS: Most parachute assemblies that use Velcro®.
　
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