What is the primary use of safety wires in aviation maintenance?

The primary use of safety wires in aviation maintenance is to prevent bolts and nuts from loosening due to vibration. In aviation, aircraft operate under conditions that can produce significant vibrations, especially during takeoff, flight, and landing. These vibrations can cause fasteners such as bolts and nuts to gradually loosen over time, which might lead to mechanical failures or complications if not addressed properly.

Safety wiring is a technique that involves threading a wire through the heads of bolts or nuts, securing them in place. This method acts as a supplementary measure to ensure that the fasteners remain tight, even with the constant exposure to vibrations experienced in flight. Such precautions are critical in maintaining the safety and integrity of aircraft systems and components.

The other options, while relevant to different aspects of aviation maintenance or design, do not accurately describe the primary function of safety wires. Enhancing aerodynamic efficiency and reducing friction do not pertain to the function of safety wires, and stabilizing electrical wiring is unrelated to the mechanical fastening of components. Thus, the correct answer focuses on the safety and reliability provided by safety wires in preventing mechanical loosening.