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TURNBUCKLE SAFETYING | Up
Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them | Next
CHAPTER 3 GENERAL AIRCRAFT MAINTENANCE |
Lock clips must be examined after assembly for
proper engagement of the hook lip in the turnbuckle
barrel hole by the application of slight pressure in the
disengaging direction. Lock clips must not be reused,
as removal of the clips from the installed position will
severely damage them.
Wire-Wrapping Turnbuckles
First, two safety wires are passed through the hole
in the center of the turnbuckle barrel. The ends of the
wires are bent 90 degrees toward the ends of the
turnbuckle, as shown in figure 2-59.
Next, the ends of the wires are passed through the
holes in the turnbuckle eye or between the jaws of the
turnbuckle fork, as applicable. The wires are then
bent toward the center of the turnbuckle, and each one
wrapped four times around the shank. This secures
the wires in place.
When a swaged turnbuckle terminal is being
safetied, one wire must be passed through the hole
provided for this purpose in the terminal. It is then
looped over the free end of the other wire, and both
ends wrapped around the shank.
Clip-Locking Turnbuckles
The clip-locking method of safetying uses an
NAS lock clip. To safety the turnbuckle, align the slot
in the barrel with the slot in the cable terminal. Hold
the lock clip between the thumb and forefinger at the
end loop. Insert the straight end of the clip into the
aperture formed by the aligned slots. Bring the hook
end of the lock clip over the hole in the center of the
turnbuckle barrel and seat the hook loop into the hole.
Application of pressure to the hook shoulder at the
hole will engage the hook lip in the turnbuckle barrel
and complete the safety locking of one end. The
above steps are then repeated on the opposite end of
the turnbuckle barrel.
Both locking clips may be
inserted in the same turnbuckle barrel hole, or they
may be inserted in opposite holes.
RECOMMENDED READING LIST
NOTE: Although the following references were
current when this TRAMAN was published, their
continued currency cannot be assured. Therefore,
you need to be sure that you are studying the latest
revision.
Structural Hardware, NAVAIR 01-1A-8, Com-
mander, Naval Air Systems Command,
Washington D. C., 1 January 1991.
Aviation Hydraulics Manual, NAVAIR 01-1A-17,
Commander, Naval Air Systems Command,
Washington D. C., 1 February 1992.
Aviation Hose and Tube Manual, NAVAIR 01-1A-20,
Commander, Naval Air Systems Command,
Washington D. C., Rapid Action Change 3,
10 March 1993.
2-47
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