Abstract: An aircraft brake control system for controlling a plurality of brakeable wheels of a landing gear. Each brakeable wheel includes a brake actuator and a wheel speed sensor. The system includes a controller configured to receive aircraft control parameters and provide brake commands to the brake actuator of each wheel. The controller being configured to activate pre-retraction braking in response to an aircraft control parameter indicating that landing gear retraction is required and execute a functional brake test during pre-retraction braking.

Abstract: A method of operating an aircraft is disclosing including, during a non-braking time period, taxiing the aircraft by using driving torque provided by a landing gear drive system, and not providing a braking torque from the landing gear brake system, and, during a braking time period, providing the brake command device at one or more command levels within a sub-range of a brake command range, and controlling the landing gear drive system, in response to the level of the brake command device, to reduce the driving torque provided.

Abstract: An aircraft system for an aircraft having a controller configured to determine, based on a criterion indicative of an aircraft condition or a runway condition, a maximum braking level able to be applied to a brake of the aircraft in an emergency braking mode.