TM 10-1670-280-23&P 0031 00
UNIT MAINTENANCE
100-FOOT DIAMETER CARGO PARACHUTE
SUSPENSION RISER
0031 00-1
THIS TASK COVERS:
Repair
Replace
Tools
Brush, Stencilling (Item 4, WP 0050 00)
Knife (Item 7, WP 0050 00)
Knife, Hot Metal (Item 8, WP 0050 00)
Sewing Machine,Heavy-Duty (Item 21, WP 0050 00)
Yardstick (Item 26, WP 0050 00)
Materials/Parts
Ink, Marking, Parachute, Strata-Blue (Item 17, WP 0059 00)
Stencil Board, Oiled (Item 26, WP 0059 00)
Thread, Nylon, Size 6 (Item 39/40, WP 0059 00)
Webbing, Nylon, Tubular, 1-IN. (Item 47, WP 0059 00)
Webbing, Nylon, Type XII (Item 52, WP 0059 00)
Webbing, Nylon, Type XVIII, 1-IN. (Item 53, WP 0059 00)
Personnel Required
92R (10) Parachute Rigger
Equipment Condition
Unpacked, laid flat on repair table.
References
WP 0014 00, WP 0016 00
REPAIR
1. Restitching. Restitch broken or loose stitching according to original construction details using the
specifics in WP 00014 00, SEWING PROCEDURES.
2. Restencil. As required, restencil identification markings using the procedures in WP 0016 00, MARKING
AND RESTENCILLING.
3. Splicing. A suspension riser that is constructed of either 1-inch wide tubular nylon or type XVIII nylon
webbing may be spliced. The material used for splicing must be the same material as the riser being
spliced. Splicing may be made even though the webbing has been cut completely through. Each
suspension riser web is limited to one splice and each riser is limited to three splices for the entire riser.
Splice a damaged suspension riser web as follows:
a. Lightly sear the damaged area to prevent the damaged webbing from fraying.
b. Cut a piece of type XVIII, 1-inch wide nylon webbing, or 1-inch wide tubular nylon webbing, whichever
is applicable, so it will extend at least 5-inches beyond the damaged area on each side.
c. Cut three 3 ½-inch cut lengths of type XII, 1 23/32-inch wide nylon webbing.
d. Take the type XII, 1 23/32-inch wide nylon webbing in 3 ½-inch cut lengths and make a fixed keeper in
the center of the splice over the damaged area, and at each end of the splice. The keepers at the
ends of the splice shall be positioned so as to extend 5/8-inch beyond the end of the splice.
e. Secure the splice by stitching with two three-point W-W stitch patterns using a heavy-duty sewing
machine and size 6 nylon thread, 5 to 8 stitches per inch, according to details in the illustration on the
following page.
