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Emission Standards Reference Guide

Aircraft -- Exhaust Emission Standards

  Year Pressure Ratio (PR) Applicabilitya HC (g/kN) NOx
(g/kN)
CO (g/kN) Smoke
Federalb 1974+ - T8 - - - 30
1976+ - TF with rOc ≥ 129 kN - - - 83.6(rO)-0.274
1978+ - T3d - - - 25
1983+ - TF with rO < 26.7 kN - - - 83.6(rO)-0.274  NTE max of SN=50
1984+ - T3, T8, TF with rO ≥ 26.7 kN 19.6 - - 83.6(rO)-0.274  NTE max of SN=50
- TSS 140(.92)rPR - - 83.6(rO)-0.274 NTE max of SN=50
- TSS with rO ≥ 26.7 kN 140(.92)rPR - - 83.6(rO)-0.274  NTE max of SN=50
- TP with rO ≥ 1,000 kW - - - 187(rO)-0.168
1997+ - T3, T8, TF with rO > 26.7 kN 19.6 40+2(rPR) 118 83.6(rO)-0.274  NTE max of SN=50
- T3, T8, TF newly certified with rO > 26.7 kN 19.6 32+1.6(rPR) 118 83.6(rO)-0.274  NTE max of SN=50
2000+ - T3, T8, TF newly manufactured with rO > 26.7 kN 19.6 32+1.6(rPR) 118 83.6(rO)-0.274  NTE max of SN=50
2005+ PR ≤ 30 T3, T8, TF newly certified with rO > 89 kN - 19+1.6(rPR) - -
T3, T8, TF newly certified with 26.7 kN < rO ≤ 89 kN - 37.572+1.6(rPR)-0.2087(rO) - -
30 < PR < 62.5 T3, T8, TF newly certified with rO>89 kN - 7+2.0(rPR) - -
T3, T8, TF newly certified with 26.7kN < r0 ≤ 89kN - 42.71+1.4286(rPR)-0.4013(rO)+0.00642(rPR)(rO) - -
PR ≤ 62.5 T3, T8, TF - 32+1.6(rPR) - -

 

Notes:
The test procedures are the International Civil Aviation Organization (ICAO) Smoke Emission Test Procedure and the ICAO Gaseous Emissions Test Procedure.  There is no useful life or warranty period for purposes of compliance with aircraft emissions standards.

a  T8=all aircraft gas turbine engines of the JT8D model family
TF=all turbofan and turbojet aircraft engines except engines of Class T3, T8, and TSS
T3=all aircraft gas turbine engines of the JT3D model family
TSS=all aircraft gas turbine engines for aircraft operations at supersonic flight speeds
TP=all aircraft turboprop engines

b  Federal standards apply to planes operating in the United States, regardless of where they were manufactured.

c  Rated output (rO) is the maximum power/thrust available for takeoff.

d  T3 engines are no longer manufactured but are in the existing fleet.

Code of Federal Regulations (CFR) Citations:
  • 40 CFR Part 87 = Aircraft emission standards, test procedures, certification requirements

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