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the same time. This ensures a perfect match and alignment [Figure D].
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1.9 For the 2 x 2" patch, peel back one edge of the paper backing and center the tape over the
damaged area. Press the exposed adhesive side of the tape to the fabric and smoothly peel the
rest of the paper from the fabric with one hand while smoothing the fabric with the other
hand [Figure E].
1.10 Use the wallpaper roller to smooth out the patch and remove any air bubbles from the patch
[Figure F].
1.11 For a double-side patch, turn the canopy or damaged material inside out. Align the second
piece of ripstop with the edges of the first and repeat the process. Again smooth out the tape
with the roller.
1.12 If the patch is to be a temporary one, the repair is complete. If, however, it is to be permanent,
it may be advisable to sew around the edge of the patch. In this case, use the single
needle machine and sew approximately 1/8" in from the edge of the tape. Overstitch a
minimum of 1.25" [Figure G].
2.0 INSPECTION:
2.1 The ripstop should be centered over the damaged area.
2.2 The tape should be smooth with no air bubbles.
2.3 Double-sided patches must be aligned.
2.4 If sewn, tension, edge spacing, and overstitch must be correct.
Parachute Repair Procedure
TITLE: 7.1.3 Round and Square Canopy – Basic Patch
NUMBER OF PAGES: 3
APPLICABLE PRODUCTS: All canopies; round and square; main and reserve.
DESCRIPTION: Application of a basic canopy patch.
AUTHORIZED REPAIRMEN: FAA Senior or Master Parachute Rigger
MATERIALS: E thread—color to match
Fabric—type and color to match
MACHINES: 301 Straight Stitch—Light Duty 7-11 SPI
EQUIPMENT:
Scissors
Seam ripper
Marking pencil
6" ruler
Patching square [Figure A]
Pin board
Straight pins
Basting iron
PROCEDURE
1.0 Note: Round canopies have the patch installed on the inside of the canopy. Square canopies
may have the patch applied to either inside or outside. Follow the manufacturer’s instructions.
1.1 Turn the canopy inside out and place on the repair table over the pin board. Smooth the
canopy fabric out. Pin the fabric to the pin board leaving a suitable distance around the damaged
area to work with.
1.2 Mark the damaged area line with the marking pencil [Figure B]. Make sure the marked area
aligns with the weave of the ripstop fabric.
1.3 Using the patching square, mark a parallel line 5/8" outside of the damaged area line
[Figure C]. This will be the patch fold line.
1.4 Again using the patching square, mark a parallel line 3/4" outside of the 5/8" line [Figure D].
1.5 Draw a line from the corners of the 5/8" line to the corners of the 3/4" line [Figure E].
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1.6 Take the basting iron and make a basting hole at the ends of the corner lines [Figure F]. These
holes will precisely mark the extent of the corner cuts and prevent unnecessary raveling of
the corners. In addition, if the canopy is made from dark colored material such as black,
when the rigger turns the patch over to do the inside folds, because the pencil marks do not
show through the dark material, the corners will be precisely defined for remarking the lines
on the inside.
1.7 Take the repair material and cut a patch piece approximately 3" larger in both directions than
the dimensions created by the 3/4" line perimeter. Make sure that two of the adjacent edges
are cut square with the weave of the fabric and form a right angle.
1.8 Take the patching square and draw a line 3/4" in and parallel to the two even edges [Figure
G].
1.9 Take one edge of the patch and fold on one line. Lay it on the canopy and align the fold along
the 3/4" line and match up the corners. Pin or baste the patch in place [Figure H].
1.10 Fold the second side of the patch back at the 3/4" line and pin in place [Figure J].
1.11 Take the third side of the patch and fold back at the 3/4" line. Take the patching square and
measure 3/4" back from the fold. Trim the patch material at this line. Fold the patch UNDER
at the 3/4" line and pin in place [Figure K].
1.12 Take the last side of the patch and repeat step 1.11 [Figure L].
1.13 The basic patch should now be pinned in place.
1.14 Using the single needle machine, sew the outside of the patch in place with the seam approximately
1/16" from the edge of the patch [Figure M]. Overstitch a minimum of 1.25".
Carefully release tension on the thread without pulling on the canopy fabric. Doing so will
result in pulled and distorted fabric. Trim the thread.
1.15 Remove the canopy from the machine.
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Parachute Rigger Handbook(71)
