ARMY TM 10-1670-276-23&P
AIR FORCE T.O. 13C5-29-2
NAVY NAVAIR 13-1-29
2-22. Vent Lines.
This task covers:
Knife, Item 5, Appendix B
Inspected (paragraph 2-9)
Knife, Hot Metal, Item 6, Appendix B
Cleaned (paragraph 2-12)
Sewing Machine, Zig-Zag Item 14, Appendix B
Unpacked, canopy In proper layout
Yardstick, Item 20, Appendix B
Cord, Nylon, Type II, Item 13, Appendix D
Pencil, Marking Aid, Item 21/22, Appendix D
Thread, Nylon, Size E, Items 33/34, Appendix D
Repair. Repair vent lines requiring restitching as follows
(1) Use a zig-zag sewing machine to restitch any loose or broken stitches
(2) Restitch over original stitch pattern using nylon thread, size E Overstitch 1/2 Inch to lock stitches
Replace. Replace missing or damaged vent lines as follows
(1) Place canopy In proper layout on table and trace damaged vent line from one end of original vent line to other
end. Using suitable marker, mark canopy at each end of vent line.
(2) Remove damaged vent line by cutting stitching that holds line to canopy at both sides of apex.
(3) Cut a 14-inch length of type II, nylon cord Sear or dip ends of cord (para 2-18).
(4) Position one end of new vent line In exact location formerly occupied by end of old line (figure 2-40).
Measuring from the outside edge of the upper lateral band, the vent line should extend 2
inches into radial seam.
(5) Using a zig-zag sewing machine and nylon thread, size E, stitch new line In place Begin stitching on line 1/4 inch
above upper edge of vent reinforcement tape and sew to 1/4 Inch beyond end of line, 7 to 11 stitches per inch
and 1/8 wide (figure 2-40).
(6) Pass remaining end of line under other vent lines, and through bndle loop as required.
(7) Position and sew remaining end of line to opposite side of canopy as In steps (4) and (5) above.