14 C.F.R. § 135.183 Performance requirements: Land aircraft operated over water.
Title 14 - Aeronautics and Space
No person may operate a land aircraft carrying passengers over water unless— (a) It is operated at an altitude that allows it to reach land in the case of engine failure; (b) It is necessary for takeoff or landing; (c) It is a multiengine aircraft operated at a weight that will allow it to climb, with the critical engine inoperative, at least 50 feet a minute, at an altitude of 1,000 feet above the surface; or (d) It is a helicopter equipped with helicopter flotation devices.
Title 14: Aeronautics and Space
PART 135—OPERATING REQUIREMENTS: COMMUTER AND ON DEMAND OPERATIONS AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT
Subpart C—Aircraft and Equipment
§ 135.183 Performance requirements: Land aircraft operated over water.
