What is the maximum length for the takeoff run according to 14 CFR 135.379?

According to 14 CFR 135.379, the maximum length for the takeoff run is defined as the length of the runway only. This regulation specifically focuses on the usable runway length that is available for the aircraft to achieve takeoff speed.

Stopways and clearways, while important for safety and operational considerations, are not included in the calculation of the takeoff run length as per this regulation. The stopway serves as an extension beyond the runway to provide additional braking distance in case of a rejected takeoff, and the clearway is an area beyond the runway that must remain clear of obstacles to facilitate a safe climb after takeoff. However, these additional areas are considered separate from the runway length used for takeoff calculations in compliance with federal regulations.

Thus, the focus on the runway length alone is oriented toward standardizing takeoff performance measurements and ensuring uniformity across different aircraft operations covered under Part 135 of the regulations.