[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: 14CFR27.471]

[Page 583]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 27_AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT--Table 
of Contents
 
                     Subpart C_Strength Requirements
 
Sec.  27.471  General.

    (a) Loads and equilibrium. For limit ground loads--
    (1) The limit ground loads obtained in the landing conditions in 
this part must be considered to be external loads that would occur in 
the rotorcraft structure if it were acting as a rigid body; and
    (2) In each specified landing condition, the external loads must be 
placed in equilibrium with linear and angular inertia loads in a 
rational or conservative manner.
    (b) Critical centers of gravity. The critical centers of gravity 
within the range for which certification is requested must be selected 
so that the maximum design loads are obtained in each landing gear 
element.