Final answer:
To determine the minimum landing distance required for a planned weight, additional information such as the aircraft type, landing speed, and runway conditions is needed.
Step-by-step explanation:
The Expected RCC values for runway 19R at IAD are given as 5/6/6 based on the FICON NOTAM. RCC stands for Runway Condition Code, which is a measure of the condition of the runway surface. The numbers 5/6/6 represent different conditions for the runway, ranging from dry to covered in ice or snow. To determine the minimum landing distance required for your planned weight, you would need additional information such as the aircraft type, landing speed, and runway conditions. This calculation is typically performed using aircraft performance charts specific to the aircraft being used.