Loads parallel to hinge line.
CFR · 2024-01-01 · US · Title 14
(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 (1) (2) (3)
official document · source cfr-2024 · id 14:§ 25.393