[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR25.181]

[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.  25.181  Dynamic stability.

    (a) Any short period oscillation, not including combined lateral-
directional oscillations, occurring between 1.13 VSR and 
maximum allowable speed appropriate to the configuration of the airplane 
must be heavily damped with the primary controls--
    (1) Free; and
    (2) In a fixed position.
    (b) Any combined lateral-directional oscillations (``Dutch roll'') 
occurring between 1.13 VSR and maximum allowable speed 
appropriate to the configuration of the airplane must be positively 
damped with controls free, and must be controllable with normal use of 
the primary controls without requiring exceptional pilot skill.

[Amdt. 25-42, 43 FR 2322, Jan. 16, 1978, as amended by Amdt. 25-72, 55 
FR 29775, July 20, 1990; 55 FR 37607, Sept. 12, 1990; Amdt. 25-108, 67 
FR 70827, Nov. 26, 2002]

                                 Stalls