TM 10-1670-292-23&P 0019 00
UNIT MAINTENANCE
MC1-1C/MC1-1D TROOP BACK PARACHUTE ASSEMBLY
RADIAL SEAM
0019 00-1
THIS TASK COVERS:
=
Repair
INITIAL SETUP:
Tools
Knife (Item 13, WP 0042 00)
Needle, Basting (Item 18, WP 0042 00)
Sewing Machine, Light-Duty (Table 1, WP 0012 00)
Shears (Item 28, WP 0042 00)
Materials/Parts
Cloth, Parachute, Type I (Item 12/13, WP 0055 00)
Thread, Cotton (Item 48, WP 0055 00)
Thread, Nylon, Size A (Item 51, WP 0055 00)
Thread, Nylon, Size E (Item 49/52, WP 0055 00)
Pushpins (local purchase)
Personnel Required
92R(10) Parachute Rigger
Equipment Condition
Parachute canopy laid out on table.
References
Group No. 01, MAC (WP 0045 00)
Table 1, WP 0012 00; Table 2, WP 0012 00;
Table 3, WP 0012 00; WP 0012 00
REPAIR
Patching repairs the 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:
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 that may interfere with the
patching process.
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 the original canopy construction, cut a rectangular patch 3½-
inches wider and 4-inches longer than the damaged area. If one piece of material is not long enough
to achieve the cited size, join additional pieces of cut material with ½-inch-wide lapped seams.
5. Fold the patch material lengthwise and align the raw edges.
6. Center and secure the radial seam patch material over the damaged area with pushpins. Fold-under
½-inch on each side of the new patch material and secure each side with pins.
7. Fold-under 1-inch at each end of the new patch material and secure with pins. Baste both sides of the
new patch to the canopy using the procedures in WP 0012 00.
