BTS | Table 4-34: Federal Exhaust Emissions Standards for Newly Manufactured and In-Use Aircraft Engines (a,b)

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Table 4-34: Federal Exhaust Emissions Standards for Newly Manufactured and In-Use Aircraft Engines^a,b

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Engine type^c	Pollutant	Year of engine manufacture
Engine type^c	Pollutant	1974-75	1976-77	1978-82	1983	1984-96	1997-99	2000+
Turboprop	Smoke					^g187(rO)^-0.168	^g187(rO)^-0.168	^g187(rO)^-0.168
Class T3 turbojet	CO (g/kN)^d						118	118
Class T3 turbojet	HC (g/kN)^d					19.6	19.6	19.6
Class T3 turbojet	NO_x (g/kN)^d						^e40 + 2(rPR)	^f32 + 1.6(rPR)
Class T3 turbojet	Smoke			25	25	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274
Class T8 turbojet	CO (g/kN)^d						118	118
Class T8 turbojet	HC (g/kN)^d					19.6	19.6	19.6
Class T8 turbojet	NO_x (g/kN)^d						^e40 + 2(rPR)	^f32 + 1.6(rPR)
Class T8 turbojet	Smoke	30	30	30	30	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274
Turbofan and turbojet engines other than Classes T3, T8, and TSS	CO (g/kN)^d						118	118
Turbofan and turbojet engines other than Classes T3, T8, and TSS	HC (g/kN)^d					19.6	19.6	19.6
Turbofan and turbojet engines other than Classes T3, T8, and TSS	NO_x (g/kN)^d						^e40 + 2(rPR)	^f32 + 1.6(rPR)
Turbofan and turbojet engines other than Classes T3, T8, and TSS	Smoke		ⁱ83.6(rO)^-0.274	ⁱ83.6(rO)^-0.274	^j83.6(rO)^-0.274	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274
TSS engines (supersonic aircraft engines)	HC (g/kN)					140(0.92)^rPR	140(0.92)^rPR	140(0.92)^rPR
TSS engines (supersonic aircraft engines)	Smoke					^h83.6(rO)^-0.274	^h83.6(rO)^-0.274	^h83.6(rO)^-0.274

KEY: CO = carbon monoxide; g = gram; g/kN = grams of pollutant per kilonewtons of thrust; HC = hydrocarbon, kN = kilonewtons; kW = kilowatt; NOx = nitrogen oxides; rO = rated output, which is the maximum power or thrust available for takeoff; rPR = rated pressure ratio.

^aFederal standards apply to all planes operating in the United States, regardless of where they were manufactured. This table primarily displays exhaust emissions standards for newly manufactured aircraft engines. Only two standards (smoke standards) have been set for in-use aircraft engines (see footnotes i and k). Therefore, unless otherwised noted, emissions in this table apply to new aircraft engines only.

^bHC, CO, and NOx are measured using the International Civil Aviation Organization (ICAO) Gaseous Emissions Test Procedure. Smoke is measured using the ICAO Smoke Emission Test Procedure. There is no useful life or warranty period for purposes of compliance with emissions standards.

^cExamples of commercial aircraft that use each engine type include the following:

Class T3 turbojet–Boeing 707-320s (Class T3 engines are currently out of production, though some are still in use).

Class T8 turbojet–Boeing 727s and 737-200s, and McDonnell-Douglas MD-80s and DC-9s.

Turbofans and turbojets other than T3, T8, and TSS–Boeing 747-400s, 757s, 767-200s and 777s, and McDonnell-Douglas MD-11s; Canadair Regional Jets.

Turboprops–Used mostly in regional airliners such as ATR 72, Dornier 328, and Saab SF 340.

TSS–British Aircraft Corp./Aerospatiale Concorde (the only supersonic aircraft currently used in commercial civil aviation).

^dApplies to engines with rO>26.7 kN.

^eEffective as of July 7, 1997. This standard applies only to those engines of a type or model for which the date of manufacture of the first individual production model was on or before Dec. 31, 1995 and for which the date of manufacture of the individual engine was on or before Dec. 31, 1999.

^fEffective as of July 7, 1997. This standard also applies to engines of a type or model for which the date of manufacture of the first individual production model was after Dec. 31, 1995 and for which the date of manufacture of the individual engine was after Dec. 31, 1999.

^gEngines with rO>=1,000 kW.

^hEngines manufactured on or after Jan. 1, 1984 and with rO>=26.7 kN. Smoke number may not exceed 50.

ⁱEngines with rated output rO>=129 kN. This is also the in-use standard for all such aircraft engines.

^jEngines with rO<26.7 kN. Smoke number may not exceed 50.

^kClass T8 turbojet engines shall not exceed a smoke number of 30 beginning Feb. 1, 1974.

SOURCE:

40 CFR 87, Subparts A-D (July 1, 2000), and U.S. Environmental Protection Agency, Office of Air and Radiation, personal communication, Aug. 28, 2001.

Table 4-34: Federal Exhaust Emissions Standards for Newly Manufactured and In-Use Aircraft Enginesa,b

Table 4-34: Federal Exhaust Emissions Standards for Newly Manufactured and In-Use Aircraft Engines^a,b