[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR29.21]

[Page 617]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 29--AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT--Table of Contents
 
                            Subpart B--Flight
 
Sec. 29.21  Proof of compliance.

                                 General


    Each requirement of this subpart must be met at each appropriate 
combination of weight and center of gravity within the range of loading 
conditions for which certification is requested. This must be shown--
    (a) By tests upon a rotorcraft of the type for which certification 
is requested, or by calculations based on, and equal in accuracy to, the 
results of testing; and
    (b) By systematic investigation of each required combination of 
weight and center of gravity, if compliance cannot be reasonably 
inferred from combinations investigated.

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29-24, 49 
FR 44435, Nov. 6, 1984]