TM 10-1670-292-23&P 0028 00 0028 00-2 e. Secure the formed retaining strap with the guide ring, to the riser. Use a medium-duty sewing machine and size E nylon thread, and refer to the illustration above and Tables 1 and 2, WP 0012 00, as a reference. 2. Replacing a control line channel. Repair a damaged or missing control line channel by fabricating as follows: a. If applicable, remove an original control line channel from a riser by cutting the stitching securing the channel to the riser. b. Cut a 5-inch length of 1½-inch-wide, type III, nylon tape; sear the ends. c. Make a ½-inch-long fold-back on each end of the tape. Secure each fold-back by making a single row of stitching across the tape width at a point 1/8-inch back from the seared edged of the fold-back.
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