ARMY TM 10-1670-281-23&P
AIR FORCE T.O. 13C5-32-2
NAVY NAVAIR 13-1-32
2-27. Patching a Radial Seam.
This task covers:
Shears, Item 14, Appendix B
Cleaned, paragraph 2-12
Sewing Machine, Light Duty, Item 16, Appendix B
Inspected, paragraphs 2-9, paragraph 2-13
Yardstick, Item 24, Appendix B
Unpacked, canopy laid flat
Thread, Nylon, Size E, Items 39/40, Appendix D
Cloth, Parachute, Nylon, Type I, Item 11, Appendix D
a. Inspection. Inspect the radial seam in accordance with table 2-1.
b. Preparation for Patching. Prepare the radial seam for patching as follows:
(1) Place the canopy on a repair table with the damaged side of the radial seam facing up.
(2) As required, cut the applicable stitching to remove or lay aside items which may interfere with the
(3) Smooth the canopy material surrounding the damaged area and secure the undamaged portion of
the seam to the table with pushpins. Do not pin the damaged area of the seam.
(4) Using the same type material as in original canopy construction, bias-cut a rectangular patch 3 1/2
inches wider and 4 inches longer than the damaged area. If one piece of material is not long enough
to achieve the required size, join additional pieces of bias-cut material with 1/2-inch-wide lapped
Patch material for a damaged area that does not exceed 1 inch need not be bias
c. Patching Radial Seam. There is no limit to the length of a miscellaneous patch made on a canopy
radial seam. In addition, a radial seam may be patched on both the inside and the outside of a canopy, as
required. Patch a damaged radial seam as follows (see figure 2-119):
(1) Fold the patch material lengthwise and aline the raw edges.
(2) Make a fold-under on each edge of the patch material and baste each fold-under using the
procedures in paragraph 2-19.