b. Using darning needle and a length of size A or E nylon thread, begin darning at one corner of
marked area. Working parallel with the marking, pass needle and thread back and forth through
material until opposite diagonal corner of marked area is reached as shown in illustration A,
B HAND DARNING
c. Turn material and weave needle and thread back and forth across stitching made in b., above,
until hole is completely darned as shown in b., above.
d. If applicable, restencil informational data or identification marks as outlined in WP 0052 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 ¼-inch beyond one end of cut or tear, stitch lengthwise along damaged area
to a point ¼-inch beyond opposite end of cut or tear.
A STRAIGHT CUT OR TEAR STITCHING