Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2023-01-01Original Date: 2023-01-01Title: Section 25.393 - Loads parallel to hinge line.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. - Control Surface and System Loads.
§ 25.393 Loads parallel to hinge line. (a) Control surfaces and supporting hinge brackets must be designed for inertia loads acting parallel to the hinge line. (b) In the absence of more rational data, the inertia loads may be assumed to be equal to KW, where— (1) K = 24 for vertical surfaces; (2) K = 12 for horizontal surfaces; and (3) W = weight of the movable surfaces.