[Code of Federal Regulations]

[Title 14, Volume 1]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR25.239]



[Page 367]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

 

PART 25_AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES--Table 

of Contents

 

                            Subpart B_Flight

 

Sec. 25.239  Spray characteristics, control, and stability on water.



    (a) For seaplanes and amphibians, during takeoff, taxiing, and 

landing, and in the conditions set forth in paragraph (b) of this 

section, there may be no--

    (1) Spray characteristics that would impair the pilot's view, cause 

damage, or result in the taking in of an undue quantity of water;

    (2) Dangerously uncontrollable porpoising, bounding, or swinging 

tendency; or

    (3) Immersion of auxiliary floats or sponsons, wing tips, propeller 

blades, or other parts not designed to withstand the resulting water 

loads.

    (b) Compliance with the requirements of paragraph (a) of this 

section must be shown--

    (1) In water conditions, from smooth to the most adverse condition 

established in accordance with Sec. 25.231;

    (2) In wind and cross-wind velocities, water currents, and 

associated waves and swells that may reasonably be expected in operation 

on water;

    (3) At speeds that may reasonably be expected in operation on water;

    (4) With sudden failure of the critical engine at any time while on 

water; and

    (5) At each weight and center of gravity position, relevant to each 

operating condition, within the range of loading conditions for which 

certification is requested.

    (c) In the water conditions of paragraph (b) of this section, and in 

the corresponding wind conditions, the seaplane or amphibian must be 

able to drift for five minutes with engines inoperative, aided, if 

necessary, by a sea anchor.



                    Miscellaneous Flight Requirements