TURNBUCKLE SAFETYING

geometrical pattern, using the single-wire method. The following general rules apply to safety wiring: 1. All safety wires must be tight after installa- tion, but not under so much tension that normal handling or vibration will break the wire. 2. The wire must be applied so that all pull exerted by the wire tends to tighten the nut. 3. Twists should be tight and even, and the wire between nuts as taut as possible without overtwisting. Wire between nuts should be twisted with the hands. The use of pliers will damage the wire. Pliers maybe used only for final end twist before cutting excess wire. Annealed copper safety wire is used for sealing first aid kits, portable fire extinguishers, oxygen regular emergency valves, and other valves and levers used for emergency operation of aircraft equipment. This wire can be broken by hand in case of an emergency. TURNBUCKLE SAFETYING When all adjusting and rigging on the cables is completed, safety the turnbuckles as necessary. Only two methods of safetying turnbuckles have been adopted as standard procedures by the armed services: the clip-locking (preferred) method and the wire-wrapping method. Figure 2-59.—Safetying turnbuckles: (A) preferred method; (B) wire-wrapped method. 2-46