FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 2. Fabric Covering | 1. Practices and Precautions | 2-10. Lacing
AC 43.13-1B
9/8/98
Step 9. Pull cord section “D” perpendicular to the fabric sur-
face to remove all slack in the cord back to the last
rib lacing knot while working the loose knot to the
right side. Do not pull cord section “E.”
Step 10.
After all slack is removed by pulling cord section “D,”
switch hands and place a thumbnail on the loose
knot formed on the right-hand side, then secure the
knot by pulling firmly perpendicular to the fabric
surface on cord section “E.”
Step 11. After completing all lacing in the same sequence,
the end is secured with a half hitch after the modi-
fied seine knot. The knot is pulled to the inside by
routing the needle thru the wing before cutting the
cord to leave the end inside.
FIGURE 2-9c. Alternate sequence to tie a modified seine knot for rib lacing.
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