[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: 14CFR25.233]



[Page 366]

 

                     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. 25.233  Directional stability and control.



    (a) There may be no uncontrollable ground-looping tendency in 

90[deg] cross winds, up to a wind velocity of 20 knots or 0.2 

VSR0, whichever is greater, except that the wind velocity 

need not exceed 25 knots at any speed at which the airplane may be 

expected to be operated on the ground. This may be shown while 

establishing the 90[deg] cross component of wind velocity required by 

Sec. 25.237.

    (b) Landplanes must be satisfactorily controllable, without 

exceptional piloting skill or alertness, in power-off landings at normal 

landing speed, without using brakes or engine power to maintain a 

straight path. This may be shown during power-off landings made in 

conjunction with other tests.

    (c) The airplane must have adequate directional control during 

taxiing. This may be shown during taxiing prior to takeoffs made in 

conjunction with other tests.



[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-23, 

35 FR 5671, Apr. 8, 1970; Amdt. 25-42, 43 FR 2322, Jan. 16, 1978; Amdt. 

25-94, 63 FR 8848, Feb. 23, 1998; Amdt. 25-108, 67 FR 70828, Nov. 26, 

2002]