14 C.F.R. § 25.393 Loads parallel to hinge line.
Title 14 - Aeronautics and Space
(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.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart C—Structure
Control Surface and System Loads
§ 25.393 Loads parallel to hinge line.
