Why are plugs included in an aircraft tool kit?

Plugs are included in an aircraft tool kit primarily to stop fuel tank leaks. In an aviation context, plugs serve an essential purpose by providing a means to seal and secure areas where fuel may escape, ensuring the safety and efficiency of the aircraft's fuel systems. The risk of fuel leaks can lead to hazardous situations, including fire risks and loss of fuel, which can affect the aircraft's overall performance and safety during operation.

While other components might seem relevant to various systems within an aircraft, the main focus here is on the specific function of plugs in relation to fuel systems. They are designed to effectively create a tight seal to prevent any fuel from leaking out, thereby maintaining the integrity of the fuel tank and the continuous operation of the aircraft.