[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: 14CFR33.33]

[Page 775]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 33_AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES--Table of Contents
 
    Subpart C_Design and Construction; Reciprocating Aircraft Engines
 
Sec.  33.33  Vibration.

    The engine must be designed and constructed to function throughout 
its normal operating range of crankshaft rotational speeds and engine 
powers without inducing excessive stress in any of the engine parts 
because of vibration and without imparting excessive vibration forces to 
the aircraft structure.