Patent ID: 8346455

Claim:
A method for measuring and communicating a normalized true runway braking coefficient of friction coefficient comprising the steps of a) Obtaining one or more sets of data points from the flight data management system (FDMS) of a first aircraft that has landed on a runway, said one or more sets of data points being obtained substantially between the time of touchdown of the first aircraft on the runway and a predetermined point in time thereafter; b) Determining a first true braking friction coefficient of the runway using at least one of the one or more of the sets of the data points from the first aircraft's flight data management system; c) Obtaining one or more sets of data points from the flight data management system of a second aircraft that has landed on a runway, said one or more sets of data points being obtained substantially between the time of touchdown of the second aircraft on the runway and a predetermined time thereafter; d) Determining a second true braking friction coefficient of the runway using at least one of the one or more of the sets of the data points from the second aircraft's flight data management system; e) Calculating from the first and second true braking coefficients of friction of the first and second aircraft a normalized braking friction coefficient of friction for the runway; and f) Communicating said normalized braking coefficient of friction to a user of such information.