SN=83.6 (rO)−0.274 (rO 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 a
smoke number (SN) of 25.
(d) Gaseous exhaust emissions from each new aircraft gas turbine engine
shall not exceed:
(1) For Classes TF, T3, T8 engines greater than 26.7 kilonewtons (6000
pounds) rated output:
(i) Engines manufactured on or after January 1, 1984:
Hydrocarbons: 19.6 grams/kilonewton r0.
(ii) Engines manufactured on or after July 7, 1997.
Carbon Monoxide: 118 grams/kilonewton r0.
(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 r0.
(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 r0.
(v) The emission standards prescribed in paragraphs (d)(1)(iii) and
(iv) of this section apply as prescribed beginning July 7, 1997.
(2) For Class TSS Engines manufactured on or after January 1, 1984:
Hydrocarbons=140 (0.92)rPR grams/kilonewtons r0.
(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 (6000 pounds)
manufactured on or after August 9, 1985
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 (6000 pounds) 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) For 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.
[Doc. No. 25613, 55 FR 32861, Aug. 10, 1990; 55 FR 37287, Sept.
10, 1990, as amended by Amdt. 34-3, 64 FR 5559, Feb. 3, 1999]