Sec. 135.367 - Large transport category airplanes:
Reciprocating engine powered: Takeoff limitations.
(a) No person operating a reciprocating engine powered large transport category airplane may take off that airplane unless it is possible --
(1) To stop the airplane safely on the runway, as shown by the accelerate-stop distance data, at any time during takeoff until reaching critical-engine failure speed;
(2) If the critical engine fails at any
time after the airplane reaches critical-engine failure speed V
(3) To clear all obstacles either by at least 50 feet vertically (as shown by the takeoff path data) or 200 feet horizontally within the airport boundaries and 300 feet horizontally beyond the boundaries, without banking before reaching a height of 50 feet (as shown by the takeoff path data) and after that without banking more than 15 degrees.
(b) In applying this section, corrections must be made for any runway gradient. To allow for wind effect, takeoff data based on still air may be corrected by taking into account not more than 50 percent of any reported headwind component and not less than 150 percent of any reported tailwind component.