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:
Code of Federal Regulations
(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.
(d)
Gaseous exhaust emissions from each new commercial aircraft gas turbine engine shall not exceed:
Hydrocarbons: 19.6 grams/kilonewton rO.
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.
(vi)
Engines of a type or model of which the date of manufacture of the first individual production model was after December 31, 2003:
(1) Engines with a maximum rated output greater than 89 kilonewtons:
Oxides of Nitrogen: (19 1.6(rPR)) grams/kilonewtons rO.
(2) Engines with a maximum rated output greater than 26.7 kilonewtons but not greater than 89 kilonewtons:
Oxides of Nitrogen: (37.572 1.6(rPR) − 0.2087(rO)) grams/kilonewtons rO.
(1) Engines with a maximum rated output greater than 89 kilonewtons:
Oxides of Nitrogen: (7 2(rPR)) grams/kilonewtons rO.
(2) Engines with a maximum rated output greater than 26.7 kilonewtons but not greater than 89 kilonewtons:
Oxides of Nitrogen: (42.71 1.4286(rPR) − 0.4013(rO) 0.00642(rPR × rO)) grams/kilonewtons rO.
Oxides of Nitrogen: (32 1.6(rPR)) grams/kilonewtons rO.
(vii)
The emission standards prescribed in paragraph (d)(1)(vi) of this section shall apply as prescribed beginning December 19, 2005.
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(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):
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(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:
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(3)
Class TP of rated output equal to or greater than 1,000 kilowatts manufactured on or after January 1, 1984:
Code of Federal Regulations
(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.