TM 10-8400-203-23
Section Il. REPAIR PROCEDURES
11-5. MATERIALS
Materials used in the repair of the plywood packboard and components will be serviceable materials recovered
from similar salvaged items when authorized, or will be new materials as specified in Section Ill. When not
available from stock, the materials may be purchased locally when they closely conform to the standard
material.
I
11-6, REPAIR AND MAINTENANCE OF PLYWOOD PACKBOARD
a. Canvas Back.
(1)
(2)
(3)
Service. Thoroughly clean the canvas back of mud or other foreign matter, using a brush, damp or dry
cloth, or scrub with water and mild soap; rinse and dry.
Inspection. Inspect the canvas back as follows:
(a) Inspect for rips, tears holes, cuts, broken, missing, or loose stitching, badly worn or deteriorated
areas, and bent or missing wire stiffeners.
(b) Check to see that all grommets and lacing cords are present, in a serviceable condition, and
properly utilized.
Repair. Hand sew open seams and straighten bent wire stiffeners as appropriate. Repair minor rips
and tears by hand sewing or with cement patches.
(a)
(b)
(c)
Sewing. Use machine for all sewing. Resew loose, broken, or defective stitches, using stitch type
301 (Fed Std 751), seven to eight per inch, and size FF thread. Maintain proper thread tension to
prevent loose stiches, and backstitch thread breaks not less than 1 inch (2.54 cm) at each break.
Darning. Darn small holes or tears not exceeding 3/4 inch (1 .90 cm) in diameter or length. Use a
circular darn for holes under 1/2 inch (1 .27 cm) in diameter and a zigzag darn for slits and tears.
Use a reinforcing piece of like material on the underside of canvas back when hole is 1/2 to 3/4 inch
(1 .90 cm) in diameter.
Patching. Patch tears and rips exceeding 3/4 inch (1 .90cm) and up to 4 inches (10.20 cm) in length.
Cut path of sufficient size to extend 1/2 inch (1.27 cm) beyond the area to be patched, allowing for
1/2 inch (1.27 cm) turnunder of raw edges. Draw torn edges together and fasten with a zigzag
stitch. Turn under raw edges of patch, apply inverted patch to underside of canvas back, and sew
1/8 inch (0.318 cm) from the outer edges. If the area to be patched contains several small holes, cut
away the damaged area after applying the inverted patch and fold edges under; sew 1/8 inch
(0.318 cm) from edge of fold.
11-6
