Learning Objective: Identify the two primary brake systems and the checks required to make sure these systems operate properly.

Brake systems are designed to retard or to stop aircraft motion on the ground. They also aid in controlling the direction of the aircraft while it is taxiing. Provisions exist for applying either one or both brakes

Figure 12-35.-Power/manual brake systems-schematic.

and for varying the braking action by the amount of movement or force exerted on the brake pedal.  Several types of naval aircraft have an antiskid system integrated with the wheel brake system to allow maximum braking. This results in a short landing roll and skid-free control as the aircraft comes to a stop.

A large portion of the maintenance effort expended by an AM in an operating activity is directed toward troubleshooting and repairing of brakes and brake systems. A brake system is generally one of two major types-independent or power. Independent systems operate independently of a pressure source other than the master cylinder. Power brake systems use utility or main hydraulic system pressure from the aircraft. The power brake systems allow for higher brake line pressures than can be obtained with the independent system.