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
9/8/98
AC 43.13-1B
Coupling nuts attached to straight connectors shall be wired as,
shown, when hex is an integral part of the connector.
Coupling nuts on a tee
shall be wired, as shown
above, so that tension is
always in the tightening di-
rection.
Straight Connector (Bulkhead Type)
Examples 26, 27, and 28 show the proper method for wiring various standard fittings with
checknut wired independently so that it need not be disturbed when removing the coupling nut.
FIGURE 7-5b. Safety-wiring procedures.
Par 7-126
Page 7-25