14 C.F.R. § 25.755 Hulls.
Title 14 - Aeronautics and Space
(a) Each hull must have enough watertight compartments so that, with any two adjacent compartments flooded, the buoyancy of the hull and auxiliary floats (and wheel tires, if used) provides a margin of positive stability great enough to minimize the probability of capsizing in rough, fresh water. (b) Bulkheads with watertight doors may be used for communication between compartments.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart D—Design and Construction
Floats and Hulls
§ 25.755 Hulls.
