0015 00   TM 10-1670-287-23&P  c.  Turn material and weave needle and thread back and forth across stitching made in step b.,  above, until hole is completely darned as shown in step b., above.  d.  If applicable, restencil informational data or identification marks as outlined in WP 0017 00.  3.  Zig-zag Sewing. (Refer to tables 1 and 2) Components of the MC-4, except parachute canopy, that  have sustained cut or tear damage may be repaired by zig-zag sewing provided the applicable  damaged area does not have any material missing and the cut or tear is straight or L-shaped. Should  the damaged area be irregular shaped or have material missing, the repair will be achieved by either  darning or patching, as required. A zig-zag sewing repair is accomplished using a zig-zag sewing  machine as follows:  a.  Set sewing machine to maximum stitch width.  b.  Beginning at a point  $^{1}$/$_{4}$ -inch beyond one end of cut or tear, stitch lengthwise along damaged area  to a point  $^{1}$/$_{4}$ -inch beyond opposite end of cut or tear.  c.  The cited stitching procedure also applies to an L-shaped cut or tear.  0015 00-6  Change 1  ¼-IN ¼-IN B L-SHAPED CUT OR TEAR STITCHING  ¼-IN ¼-IN A STRAIGHT CUT OR TEAR STITCHING 