 0015 00   TM 10-1670-287-23&P  Table 2. Stitching and Restitching Specifications - continued COMPONENT  RECOMMENDED SEWING MACHINE  (Code Symbol)  STITCHES PER INCH  THREAD  SIZE Panel, Cotton Cloth  LD, MD  7 to 11  E  Ribs  LD, MD  7 to 11  E  Binding Tape  LD, MD  7 to 11  E  Slider Stop Reinforcement  LD, MD, BT  7 to 11/42  E  Line, Suspension  BT, ZZ  42  E  Line, Control  BT, ZZ  42  E  Panel, Top/Bottom  LD, MD  7 to 11  E  Crossports  D  7 to 11  E  Slider  LD, MD  7 to 11  E  Binding Tape  LD, MD  7 to 11  E  Cloth, Nylon, Type I  DN, LD  7 to 11  A/E  Suspension Line Attaching Loop  DBL BT  Pre-set  E  Risers (re-stitch as req’d)  LD, ZZ, BT  7 to 11/42  E  Keeper, Guide Ring  BT, ZZ  42  E  Tape, Trim Tab  LD, BT  7 to 11/42  E  Channel, Release Cable  LD, MD  7 to 11  E  Keeper, Toggle  LD, BT  7 to 11/42  E  Cover, Control Line  LD, MD  7 to 11  E  Tape, Hook and Pile  LD, MD  7 to 11  E  2.  Other parachute items. Stitching and re-stitching on other parachute items constructed from cloth,  canvas, and webbing should be accomplished with thread that matches the color of the original  stitching, when possible. All straight stitching should be locked by backstitching at least ½-inch. Re- stitching should be locked by overstitching each end of the stitch formation by ½-inch. Zig-zag  stitching does not require locking; however, zig-zag re-stitching should extend at least ¼-inch into  undamaged stitching at each end, when possible. Re-stitching should be made directly over the  original stitching; follow the original stitch pattern as closely as possible.  1.  Machine darning. Proceed as follows:  a.  Using an authorized marking aid of contrasting color, mark a square around the damaged area  and ensure the marking is at least ¼-inch back from each edge of the damaged area.  b.  Darn the damaged area by sewing the material in a back and forth manner, using size A or E  nylon thread.  (Refer to Tables 1 and 2). Darning is a sewing procedure used to repair limited size holes, rips, and  tears. A darning repair may be made either by hand or by sewing machine, depending upon the method  preferred and the availability of equipment. However, a darning machine should be used to darn small  holes and tears where fabric is missing. A darning repair will be preformed using the following  procedures, as appropriate:  DARNING  0015 00-4  Change 1 