a. A patch will not be applied to a damaged area that has been previously patched.
b. There is no limitation to the number of patches or size of patch to each canopy gore section or
gore panel. However, determination should be made of the most economical method to be
used, i.e., two or more patches versus one large patch, or one large patch versus a section
replacement. A patch applied to a parachute canopy may extend from redial seam to radial
c. Use no more than two mending cloth patches on a canopy section. Limit the size of the finished
patch to 10-inches. Round the corner of the patches to 1-inch radius. Use size E nylon thread
and sew a row of 7 to 11 stitches per inch, 1/6-inch in from outer edge of patch. Table 3
prescribes sizes of parachute mending cloth.
Table 3. Mending Cloth Patching Specifications
Damaged Area Size
Patch Minimum Size
1-inch to 1 ½-inch
1 ½-inches to 2-inches
2-inches to 3-inches
3-inches to 5-inches
5-inches to 7-inches
*Maximum size for canopy patch is 10-inches.
2. Making a Basic Patch. A basic patch is used to repair damaged cloth when the affected area is no
closer than 1-inch from a radial seam or lower lateral band. Should a damaged area be closer than
1-inch to the cited areas, a miscellaneous patch will be made as detailed below. There are three
methods, which may be used to apply a basic patch, and the procedures for performing each method
are outlined in steps a. and b., as follows:
A basic patch applied to the parachute canopy by sewing will be
square or rectangular in shape. A parachute canopy basic patch
constructed from adhesive nylon parachute mending cloth may be
shaped, rectangular, or triangular as required.