What is ACC in Aviation? (Accessory)

In aviation, Accessory (ACC) refers to parts and components that are added to enhance the performance or functionality of an aircraft. These accessories can include anything from navigation equipment to lighting systems, and they are crucial in ensuring aircraft safety and efficiency. In this article, we will explore some of the most common accessory terms used in aviation, what they mean, and why they are important.

Types of Accessories used in Aviation

In aviation, there are two types of accessories that are generally used: mechanical accessories and electrical accessories.

Mechanical Accessories

Mechanical accessories are components that are attached to an aircraft to help improve its mechanical functions. These accessories can include landing gear, wheels and brakes, and other components that help control the aircraft’s movement on the ground.

One integral mechanical accessory is the pitot tube, which is used to measure the aircraft’s airspeed. The pitot tube is typically located on the aircraft’s nose or wings and measures the dynamic pressure of the surrounding air to calculate the aircraft’s speed. Without this accessory, pilots would be unable to determine how fast they are traveling, which can impede the flight’s safety.

Another example of a mechanical accessory is the wing flap. The wing flap is attached to the trailing edge of the wing and can be extended during takeoff and landing to increase lift and decrease drag. This allows pilots to safely adjust the aircraft’s altitude during takeoff and landing, increasing the plane’s maneuverability.

Electrical Accessories

Electrical accessories are components that are used to improve the electrical functions of an aircraft. These accessories include navigation and communication equipment, lighting systems, and entertainment systems.

One essential electrical accessory is the Alternator. The alternator is responsible for powering the aircraft and keeping the battery charged. This accessory is important as it keeps all electrical systems operating without interruption, guaranteeing the safety of the aircraft and its passengers.

In addition to the alternator, lighting systems are also crucial electrical accessories in aviation. These lighting systems include the landing and navigation lights, which help pilots see better in low light conditions. This ensures that pilots can land the aircraft safely, even when visibility is low, across airports worldwide.

Importance of Accessories in Aviation

Accessories are vital in ensuring the safety and efficienct of aircrafts. They help maintain the plane’s health, increase maneuverability, monitor various aspects during flight, and keep passengers comfortable during travels.

Properly installed and maintained accessories keep the aircraft functioning at peak conditions, ensuring the safety of the pilots, crew, and passengers. Additionally, accessories help to improve the aircraft’s performance, allowing for better and more efficient flights.

One example of this is the GPS navigation system. With this accessory, pilots can receive real-time information about their flight plan, weather, and other essential details. This means they can make informed decisions regarding their flight path, saving time and fuel as they transit to their destination.

Another example is the cabin equipment, which ensures passenger convenience and comfort. Cabin accessories include items like passenger entertainment systems, improved air conditioning, and even Wi-Fi connectivity. These kinds of accessories provide passengers with a relaxing and enjoyable experience during their flights, making air travel more desirable.


Accessories are essential elements in aviation. They help maintain aircraft safety, increase aircraft performance, and provide a comfortable and enjoyable experience for passengers. Understanding how these accessories work and why they are essential is paramount to smooth and safe flight operations worldwide.

When using and maintaining aircraft, it is essential to use the correct accessories to ensure proper operations. Regular maintenance, inspections, and replacing worn-out accessories guarantee that all systems operate efficiently and can provide the best, safest flights for all.