FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 7. Aircraft Hardware, Control Cables, and Turnbuckles | 10. Safety Methods for Turnbuckles | 7-182. Safety-Wire Secured Turnbuckles
AC 43.13-1B
9/8/98
FIGURE 7-26. Safetying turnbuckles.
b. For the method shown in figure
7-26D, pass one length of wire through the
center hole of the turnbuckle and bend the wire
ends toward opposite ends of the turnbuckle.
Then pass each wire end through the cable eye
or fork, or through the hole in the swaged ter-
minal, and wrap each wire around the shank
for at least four turns, cutting off excess wire.
After safetying, no more than three threads of
the turnbuckle threaded terminal should be ex-
posed.
7-182. SAFETY-WIRE SECURED
TURNBUCKLES. (See figure 7-27.) Before
securing turnbuckles, threaded terminals
should be screwed into the turnbuckle barrel
until no more than three threads of either ter-
minal are outside the barrel. After the turn-
buckle has been adjusted for proper cable ten-
sion, two pieces of safety wire are inserted,
half the wire length into the hole in the center
of the turnbuckle barrel. The safety-wires are
bent so that each wire extends half the length
of the turnbuckle on top and half on bottom.
The ends of the wires are passed through the
hole in the turnbuckle eyes or between the
jaws of the turnbuckle fork, as applicable. The
wires are then bent toward the center of the
turnbuckle and each wire is wrapped around
Page 7-44
Par 7-181