How many turns of safety wire wrapping are required for turnbuckles?

The requirement for turnbuckles is four turns of safety wire wrapping. Safety wiring is a critical safety measure used in aviation maintenance to prevent components from loosening due to vibration and operational forces. When it comes to turnbuckles, which are commonly used to adjust tension in control cables, four turns of safety wire ensure that the connection is secure and minimizes the risk of loosening under normal operating conditions. This standard is established to provide adequate tension and ensure that the safety wire will maintain its effectiveness throughout the lifespan of the component.

The other answers suggest fewer or greater numbers of turns, which would either compromise the security of the turnbuckle connection or exceed standard practice without justifiable benefit. Therefore, four turns is recognized as the optimal and standard practice for safety wiring turnbuckles in the aviation field.