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 | 7. Safetying | 7-126. Securing Oil Caps, Drain Cocks, and Valves
AC 43.13-1B
FIGURE 7-4. Use of a typical wire twister.
9/8/98
double-twisted around the valve handle, and
anchored around the threads of the pipe lead-
ing into the opposite side of the valve. When
castellated nuts are to be secured with safety
wire, tighten the nut to the low side of the se-
lected torque range, unless otherwise specified;
and, if necessary, continue tightening until a
slot lines with the hole. In blind tapped hole
applications of bolts or castellated nuts on
studs, the safety wiring should be in accor-
dance with the general instructions of this
chapter. Hollow-head bolts are safetied in the
manner prescribed for regular bolts.
NOTE: Do not loosen or tighten
properly tightened nuts to align
safety-wire holes.
NOTE: Although there are numerous
safety wiring techniques used to se-
cure aircraft hardware, practically all
are derived from the basic examples
shown in figures 7-5 through 7-5b.
FIGURE 7-4a. Securing oil caps, drain cocks, and valves.
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Par 7-126