Sec. 29.551 - Auxiliary lifting surfaces.

Each auxiliary lifting surface must be designed to withstand --

(a) The critical flight loads in 29.337 through 29.341, and 29.351;

(b) the applicable ground loads in 29.235, 29.471 through 29.485, 29.493, 29.505, and 29.521; and

(c) Any other critical condition expected in normal operation.