Final answer:
The L/R BUS TIE switches are used in aircraft electrical systems to transfer power between the left and right bus systems in case of a failure. They ensure redundancy and provide power to critical systems.
Step-by-step explanation:
The L/R BUS TIE switches in aviation refer to the Left/Right Bus Tie switches used in aircraft electrical systems. These switches are part of a system that connects the electrical power sources and distribution systems in an aircraft.
The function of the L/R BUS TIE switches is to provide a means of transferring electrical power between the left and right electrical bus systems. This allows for redundancy in case of a failure in one of the bus systems.
For example, if the left electrical bus system fails, the L/R BUS TIE switch can be closed to connect the right bus system to the left system, providing power to critical systems that may have otherwise been affected by the failure.