A system for determining a deceleration rate of an aircraft comprising: at least one component capable of transmitting a first deceleration rate; and a brake controller (212, 214) in operable communication with the at least one component and configured to receive the first deceleration rate from the at least one component and to determine a likely accurate deceleration rate based on the first deceleration rate, a second deceleration rate and a hierarchy of sources of deceleration rates; wherein the at least one component is an avionics unit capable of transmitting an avionics deceleration rate and the first deceleration rate is the avionics deceleration rate; wherein the system further comprises a first accelerometer configured to detect a first accelerometer deceleration rate and the second deceleration rate is the first accelerometer deceleration rate; a second accelerometer configured to detect a second accelerometer deceleration rate and wherein the brake controller (212, 214) is further configured to determine the likely accurate deceleration rate based on the avionics deceleration rate, the first accelerometer deceleration rate and the second accelerometer deceleration rate; and a first accelerometer monitor (224, 232) configured to detect whether the first accelerometer deceleration rate is valid and a second accelerometer monitor (226, 234) configured to detect whether the second accelerometer deceleration rate is valid, and wherein the brake controller (212, 214) is further configured to determine whether at least one of the first accelerometer deceleration rate or the second accelerometer deceleration rate is invalid, and wherein the system further comprises at least two wheel speed sensors (208, 210) configured to output wheel speed data including a wheel speed of a corresponding wheel and wherein the brake controller (212, 214) is further configured to: determine a wheel speed deceleration rate based on the wheel speed data; and determine that the likely accurate deceleration rate is the wheel speed deceleration rate in response to determining that the first accelerometer deceleration rate and the second accelerometer deceleration rate are invalid, and that the avionics deceleration rate is at least one of invalid or inaccurate. at least one component capable of transmitting a first deceleration rate; and a brake controller (212, 214) in operable communication with the at least one component and configured to receive the first deceleration rate from the at least one component and to determine a likely accurate deceleration rate based on the first deceleration rate, a second deceleration rate and a hierarchy of sources of deceleration rates; wherein the at least one component is an avionics unit capable of transmitting an avionics deceleration rate and the first deceleration rate is the avionics deceleration rate; wherein the system further comprises a first accelerometer configured to detect a first accelerometer deceleration rate and the second deceleration rate is the first accelerometer deceleration rate; a second accelerometer configured to detect a second accelerometer deceleration rate and wherein the brake controller (212, 214) is further configured to determine the likely accurate deceleration rate based on the avionics deceleration rate, the first accelerometer deceleration rate and the second accelerometer deceleration rate; and a first accelerometer monitor (224, 232) configured to detect whether the first accelerometer deceleration rate is valid and a second accelerometer monitor (226, 234) configured to detect whether the second accelerometer deceleration rate is valid, and wherein the brake controller (212, 214) is further configured to determine whether at least one of the first accelerometer deceleration rate or the second accelerometer deceleration rate is invalid, and wherein the system further comprises at least two wheel speed sensors (208, 210) configured to output wheel speed data including a wheel speed of a corresponding wheel and wherein the brake controller (212, 214) is further configured to: determine a wheel speed deceleration rate based on the wheel speed data; and determine that the likely accurate deceleration rate is the wheel speed deceleration rate in response to determining that the first accelerometer deceleration rate and the second accelerometer deceleration rate are invalid, and that the avionics deceleration rate is at least one of invalid or inaccurate. determine a wheel speed deceleration rate based on the wheel speed data; and determine that the likely accurate deceleration rate is the wheel speed deceleration rate in response to determining that the first accelerometer deceleration rate and the second accelerometer deceleration rate are invalid, and that the avionics deceleration rate is at least one of invalid or inaccurate.