[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: 14CFR36.9]

[Page 821]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 36_NOISE STANDARDS: AIRCRAFT TYPE AND AIRWORTHINESS CERTIFICATION--
Table of Contents
 
                            Subpart A_General
 
Sec.  36.9  Acoustical change: Propeller-driven small airplanes and 
propeller-driven commuter category airplanes.

    For propeller-driven small airplanes in the primary, normal, 
utility, acrobatic, transport, and restricted categories and for 
propeller-driven, commuter category airplanes for which an acoustical 
change approval is applied for under Sec.  21.93(b) of this chapter 
after January 1, 1975, the following apply:
    (a) If the airplane was type certificated under this part prior to a 
change in type design, it may not subsequently exceed the noise limits 
specified in Sec.  36.501 of this part.
    (b) If the airplane was not type certificated under this part prior 
to a change in type design, it may not exceed the higher of the two 
following values:
    (1) The noise limit specified in Sec.  36.501 of this part, or
    (2) The noise level created prior to the change in type design, 
measured and corrected as prescribed in Sec.  36.501 of this part.

[Amdt. 36-16, 53 FR 47400, Nov. 22, 1988; 53 FR 50157, Dec. 13, 1988; 
Amdt. 36-19, 57 FR 41369, Sept. 9, 1992]