The 79539 Brush Set is a collection of carbon brushes used in electrical rotating equipment such as aircraft starters, generators, or alternators. These brushes conduct electrical current between stationary and rotating components, ensuring proper operation of the electrical system.

The set typically includes multiple brushes along with springs or hardware, depending on the specific application. Carbon brushes are designed to wear gradually over time, making them a standard maintenance and replacement item.

Its primary functions include:

Conducting electrical current to rotating components (armature/rotor)
Maintaining consistent electrical contact during operation
Supporting proper performance of starters, generators, or alternators

Brush sets like the 79539 are essential maintenance components in aircraft electrical systems, ensuring reliable operation and preventing performance degradation due to worn contact surfaces.