TM 10-1670-280-23&P 0022 00
UNIT MAINTENANCE
100-FOOT DIAMETER CARGO PARACHUTE
PATCHING RADIAL SEAM
0022 00-1
THIS TASK COVERS:
Inspect
Repair
Tools
Sewing Machine, Light-Duty (Item 22, WP 0050 00)
Materials/Parts
Cloth, Parachute, Nylon, 1.6 Oz., Type II (Item 9, WP 0059 00)
Cloth, Parachute, Nylon, 1.6 Oz., Type III (Item 10, WP 0059 00)
Thread, Nylon, Size E (Item 40/41, WP 0059 00)
Personnel Required
92R (10) Parachute Rigger
Equipment Condition
Unpacked, canopy laid out flat
on repair table.
References
WP 0006 00 and WP 0014 00
INSPECTION
Inspect the radial seam in accordance with Table 1, PMCS, WP 0006 00.
REPAIR
1. Preparation for Patching. Prepare the radial seam for patching as follows:
a. Place the canopy on a repair table with the damaged side of the radial seam facing up.
b. As required, cut the applicable stitching to remove or lay aside items that may interfere with the
patching process.
c. 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.
d. Using the same type material as in original canopy construction, bias-cut a rectangular patch 3 ½-
inches wider and 4iinches 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 ½-inch wide lapped
seams.
NOTE
Patch material for a damaged area that does not exceed 1-inch
need not be bias-cut.
2. 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 (refer to illustration on the following page):
a. Fold the patch material lengthwise and align the raw edges.
b. Make a foldunder on each edge of the patch material and baste each foldunder using the SEWING
PROCEDURES in WP 0014 00.
