14 C.F.R. § 23.655 Installation.
Title 14 - Aeronautics and Space
(a) Movable surfaces must be installed so that there is no interference between any surfaces, their bracing, or adjacent fixed structure, when one surface is held in its most critical clearance positions and the others are operated through their full movement. (b) If an adjustable stabilizer is used, it must have stops that will limit its range of travel to that allowing safe flight and landing. [Doc. No. 4080, 29 FR 17955, Dec. 18, 1964, as amended by Amdt. 23–45, 58 FR 42164, Aug. 6, 1993]
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart D—Design and Construction
Control Surfaces
§ 23.655 Installation.