ARMY TM 10-1670-278-23&P
AIR FORCE T.O. 13C5-26-2
NAVY NAVAIR 13-1-27
2-24. Bridle Centering Line.
This task covers:
a. Repair
b. Replace
Tools:
Personnel Required:
Pot, Melting, Electric, Item 9, Appendix B
43E(10) Parachute Rigger
Sewing Machine, Zig-Zag, Item 13,
Appendix B
Equipment Condition:
Yardstick, Item 20, Appendix B
Inspected, Paragraph 2-9, 2-13
Materials/Parts
Cleaned, Paragraph 2-12
Unpacked, canopy laid flat
Cord, Nylon, Type IV, Item 9,
Appendix D
Reference:
Thread, Nylon, Size E, Items 27/28,
Appendix D
Group No. 01, MAC, Section II, Appendix B
a. Repair. Restitch broken or loose thread using a zig-zag sewing machine and size E nylon thread (reference
table 2-3). Stitch over original stitch pattern. Overstitch 118 inch to lock stitches.
b. Replace. Replace a damaged bridle centering line by fabricating as follows:
(1) Remove original bridle centering line by cutting stitching which secures each end of line to an attaching
vent line.
(2) Cut a 7 314-inch of type IV coreless nylon cord and sear ends (paragraph 2-19).
(3) Using a suitable marking aid, mark cord length at center and at a point 1 3/8inches on each side of
center mark (figure 2-37).
(4) Position cord length in original centering line location and temporarily hand tack the cord ends to
attaching vent line, using temporary tacking procedures outlined in paragraph 2-18a. Insure all vent
lines pass freely through loop formed at center of tacked line.
(5) Using zig-zag sewing machine and size E nylon thread, secure each end of bridle centering line to
attaching vent line by stitching a 3/16-inch-wide by 2 518-inch-long row of double-throw zig-zag stitching
from 1 3/8-inch mark made in (3) above to a point 1/8Inch beyond cord end (fig. 2-41). Stitching will be
7 to 11 stitches per inch using specifics in table 2-3. Remove the tacking made in (4) above.
2-62
