Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2023-01-01Original Date: 2023-01-01Title: Section 25.507 - Reversed braking.Context: Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 25 - AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES. Subpart C - Structure. - Ground Loads.
§ 25.507 Reversed braking. (a) The airplane must be in a three point static ground attitude. Horizontal reactions parallel to the ground and directed forward must be applied at the ground contact point of each wheel with brakes. The limit loads must be equal to 0.55 times the vertical load at each wheel or to the load developed by 1.2 times the nominal maximum static brake torque, whichever is less. (b) For airplanes with nose wheels, the pitching moment must be balanced by rotational inertia.
Code of Federal Regulations / Title 14 - Aeronautics and Space / Vol. 1 / 2023-01-01253
(c) For airplanes with tail wheels, the resultant of the ground reactions must pass through the center of gravity of the airplane.