IO-240 Series Engine Installation & Operation Manual
C-5
31 October 2011
Standard Practices
C-4. Safety Wiring Hardware
Safety wiring secures two or more parts together so any tendency of the parts to loosen
will be counteracted by increasing the tension on the safety wire attached to the other
part(s). The only way to loosen the fasteners is to remove the safety wire. Always use new
safety wire to secure hardware. Safety wire on these engines must conform to MS20995
Condition A.
CAUTION: Do not apply torque above or below specified limits to
align holes.
1. Verify the hardware (bolts or nuts) to be safety wired has been correctly torqued to
Appendix B specifications.
2. Insert half of the required length of new safety wire through the first piece of
hardware and do the following:
a. For
right-hand
threaded hardware, install the safety wire so the strand will pull
and lock
clockwise
.
b. For
left
-
hand
threaded hardware, install the safety wire so the strand will pull and
lock
counter-clockwise
.
Figure C-1. Right-hand-thread safety wire installation
(Reverse application for left hand threads)
3. As shown in Figure C-1, bend the safety wire to tightly loop around the head of the
hardware so force is exerted in the tightening direction. Ensure there is no slack in
Summary of Contents for IO-240-A
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