[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: 14CFR23.21]



[Page 182]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

 

PART 23_AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND 

COMMUTER CATEGORY AIRPLANES--Table of Contents

 

                            Subpart B_Flight

 

Sec. 23.21  Proof of compliance.



                                 General





    (a) 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--

    (1) By tests upon an airplane of the type for which certification is 

requested, or by calculations based on, and equal in accuracy to, the 

results of testing; and

    (2) By systematic investigation of each probable combination of 

weight and center of gravity, if compliance cannot be reasonably 

inferred from combinations investigated.

    (b) The following general tolerances are allowed during flight 

testing. However, greater tolerances may be allowed in particular tests:



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                   Item                               Tolerance

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Weight....................................  +5%, -10%.

Critical items affected by weight.........  +5%, -1%.

C.G.......................................  7%

                                             total travel.

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