Beyond advisory landing distance charts, a standardized system for determining and communicating runway conditions called the Runway Condition Assessment Matrix (RCAM) was established. I know … yikes. The matrix considers the type of contamination, the contamination depth, the temperature and the resulting potential braking action on the runway. The RCAM associates an assessment number from 6 to zero, with zero being a braking action “nil” report. The assessment number can be different for each third of the runway; for example, 5-5-2. Having armed you with all of this information, I bring you to my arrival story at JFK.