What runway distance is considered sufficient for worst-case landing conditions?

• A. 7200 feet
• B. 6000 feet
• C. 8000 feet
• D. 10000 feet

Answer: (A)

The important idea is to make sure the runway length is long enough to stop the airplane in the most demanding conditions. In worst-case landing, factors like maximum landing weight, high density altitude, and possible contamination increase the required distance. Seven thousand two hundred feet is the minimum length that still provides a safe margin for deceleration with full flaps, reverse thrust, and wheel brakes in those conditions. Shorter runways would risk overruns, while longer runways simply offer more margin but aren’t needed here.