[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: 40CFR87.21]

[Page 8-9]
 
                   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 C--Exhaust Emissions (New Aircraft Gas Turbine Engines)
 
Sec. 87.21  Standards for exhaust emissions.

    (a) Exhaust emissions of smoke from each new aircraft gas turbine 
engine of class T8 manufactured on or after February 1, 1974, shall not 
exceed: Smoke number of 30.
    (b) Exhaust emissions of smoke from each new aircraft gas turbine 
engine of class TF and of rated output of 129 kilonewtons thrust or 
greater, manufactured on or after January 1, 1976, shall not exceed:

SN=83.6(r0)-0.274 (r0 is in kilonewtons).

    (c) Exhaust emission of smoke from each new aircraft gas turbine 
engine of class T3 manufactured on or after January 1, 1978, shall not 
exceed: Smoke number of 25.

[[Page 9]]

    (d) Gaseous exhaust emissions from each new commercial aircraft gas 
turbine engine shall not exceed:
    (1) Classes TF, T3, T8 engines greater than 26.7 kilonewtons rated 
output:
    (i) Engines manufactured on or after January 1, 1984:

Hydrocarbons: 19.6 grams/kilonewton rO.

    (ii) Engines manufactured on or after July 7, 1997.

Carbon Monoxide: 118 grams/kilonewton rO.

    (iii) Engines of a type or model of which the date of manufacture of 
the first individual production model was on or before December 31, 1995 
and for which the date of manufacture of the individual engine was on or 
before December 31, 1999.

Oxides of Nitrogen: (40 + 2(rPR)) grams/kilonewtons rO.

    (iv) Engines of a type or model of which the date of manufacture of 
the first individual production model was after December 31, 1995 or for 
which the date of manufacture of the individual engine was after 
December 31, 1999:

Oxides of Nitrogen: (32 + 1.6(rPR)) grams/kilonewtons rO.

    (v) The emission standards prescribed in paragraphs (d)(1) (iii) and 
(iv) of this section apply as prescribed beginning July 7, 1997.
    (2) Class TSS: Engines manufactured on or after January 1, 1984:

Hydrocarbons=140(0.92) rPR grams/kilonewtons rO.

    (e) Smoke exhaust emissions from each gas turbine engine of the 
classes specified below shall not exceed:
    (1) Class TF of rated output less than 26.7 kilonewtons manufactured 
on or after (one year from date of publication):

SN=83.6(ro)-0.274 (ro is in kilonewtons) not to exceed a 
    maximum of SN=50.

    (2) Classes T3, T8, TSS and TF of rated output equal to or greater 
than 26.7 kilonewtons manufactured on or after January 1, 1984:

SN=83.6(ro)-0.274 (ro is in kilonewtons) not to exceed a 
    maximum of SN=50.

    (3) Class TP of rated output equal to or greater than 1,000 
kilowatts manufactured on or after January 1, 1984:

SN=187(ro) -0.168 (ro is in kilowatts)

    (f) The standards set forth in paragraphs (a), (b), (c), (d), and 
(e) of this section refer to a composite gaseous emission sample 
representing the operating cycles set forth in the applicable sections 
of subpart G of this part, and exhaust smoke emissions emitted during 
operations of the engine as specified in the applicable sections of 
subpart H of this part, measured and calculated in accordance with the 
procedures set forth in those subparts.

[47 FR 58470, Dec. 30, 1982, as amended at 49 FR 31875, Aug. 9, 1984; 62 
FR 25365, May 8, 1997]