[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: 14CFR34.31]

[Page 772]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 34--FUEL VENTING AND EXHAUST EMISSION REQUIREMENTS FOR TURBINE ENGINE POWERED AIRPLANES--Table of Contents
 
   Subpart D--Exhaust Emissions (In-use Aircraft Gas Turbine Engines)
 
Sec. 34.31  Standards for exhaust emissions.

    (a) Exhaust emissions of smoke from each in-use aircraft gas turbine 
engine of Class T8, beginning February 1, 1974, shall not exceed a smoke 
number (SN) of 30.
    (b) Exhaust emissions of smoke from each in-use aircraft gas turbine 
engine of Class TF and of rated output of 129 kilonewtons (29,000 
pounds) thrust or greater, beginning January l, 1976, shall not exceed

SN=83.6(rO)-0.274 (rO is in kilonewtons).

    (c) The standards set forth in paragraphs (a) and (b) of this 
section refer to exhaust smoke emissions emitted during operations of 
the engine as specified in the applicable section of subpart H of this 
part, and measured and calculated in accordance with the procedure set 
forth in this subpart.

Subparts E-F [Reserved]