ARMY TM 10-1670-294-23&P
AIR FORCE T.O. 13C5-33-2
NAVY NAVAIR 13-1-34
2-21 Attachment Loop (Birdie Loop).
This task covers:
Pot, Electric Melting, Item 14, Appendix B
Cleaned (paragraph 2-12).
Sewing Machine, Heavy Duty, Item 19, Appendix B
Inspected (paragraph 2-13).
Shears, Item 15, Appendix B
Unpacked, canopy laid flat.
Yardstick, Item 25, Appendix B
Beeswax, Item 1, Appendix D
Thread, Nylon, Size 3, Item 25/26, Appendix D
Webbing, Cotton, Type VIII, Item 34, Appendix D
Parafin, Item 32, Appendix D
Repair. Repair an attachment loop requiring restitching as follows.
Use a heavy-duty sewing machine to restitch any loose or broken stitches.
Restitch over original stitch pattern using nylon thread, size. 3 Overstitch 1/2 Inch to lock
Replace. Replace a damaged or missing attachment loop by fabricating as follows:
Cut a 20-inch length of cotton webbing, type VII. Wax ends of webbing (para 2-18).
Pass one end of webbing through all canopy vent lines. Join both webbing ends together with
a 5-inch overlap (figure 2-38).
Use a heavy duty sewing machine, secure overlapped ends, with nylon thread, size 3, stitch a
5-inch long, three point W-W stitches, 7 to 11 stitches per inch.
Cut and remove damaged attachment loop.