[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR87.31]

[Page 9]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 87--CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES--Table of Contents
 
   Subpart D--Exhaust Emissions (In-Use Aircraft Gas Turbine Engines)
 
Sec. 87.31  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: Smoke 
number 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 thrust or 
greater, beginning January 1, 1976, shall not exceed:

SN=83.6(r0)-0.274(r0 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 procedures set 
forth in this subpart.

[47 FR 58470, Dec. 30, 1982, as amended at 48 FR 2718, Jan. 20, 1983]

Subparts E-F [Reserved]

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