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each individual engine shall include at least the following
information which is applicable to the engine type:
a) name of certificating authority;
b) manufacturer's type and model designation;
c) statement of any additional modifications incorporated
for the purpose of compliance with the applicable
emissions certification requirements;
d) rated output;
e) reference pressure ratio;
f) a statement indicating compliance with Smoke
Number requirements;
g) a statement indicating compliance with gaseous
pollutant requirements.
1.4 Contracting States shall recognize as valid emissions
certification granted by the certificating authority of another
Contracting State provided that the requirements under which
such certification was granted are not less stringent than the
provisions of Volume II of this Annex
ANNEX 16 - VOLUME I1
CHAPTER 2. TURBO-JET AND TURBOFAN ENGINES INTENDED FOR
PROPULSION ONLY AT SUBSONIC SPEEDS
2.1 General
2.1.1 Applicability
2.1.1.1 The provisions of this chapter shall apply to all
turbo-jet and turbofan engines, as further specified in 2.2 and
2.3, intended for propulsion only at subsonic speeds, except
when certificating authorities make exemptions for:
a) specific engine types and derivative versions of such
engines for which the type certificate of the first basic
type was issued or other equivalent prescribed procedure
was canied out before 1 January 1965; and
b) a limited number of engines beyond the dates of applicability
specified in 2.2 and 2.3 for the manufacture of
the individual engine.
2.1.1.2 In such cases, an exemption document shall be
issued by the certificating authority, the identification plates
on the engines shall be marked "EXEMPT," and the grant of
exemption shall be noted in the permanent engine record.
2.1.1.3 The provisions of this chapter shall also apply to
engines designed for applications that otherwise would have
been fulfilled by turbo-jet and turbofan engines.
Note.- In considering exemptions, cempating authorities
should take into account the probable numbers of such engines
that will be prcduced and their impact on the environment.
When such an exemption is granted, the cempcating authority
should consider imposing a time limit on the production of such
engines for installation on new aircraft or on existing aircraft
as spares.
2.1.2 Emissions involved
2.1.3 Units of measurement
2.1.3.1 The smoke emission shall be measured and
reported in t e r n of Smoke Number (SN).
2.1.3.2 The mass (Dp) of the gaseous pollutant HC, CO,
or NO, emitted during the reference emissions landing and
takeoff (LTO) cycle, defined in 2.1.4.2 and 2.1.4.3, shall be
measured and reported in grams.
2.1.4 Reference conditions
2.1.4.1 Atmospheric conditions
The reference atmospheric conditions shall be ISA at sea
level except that the reference absolute humidity shall be
0.00634 kg waterlkg dry air.
2.1 A.2 Thrust settings
The engine shall be tested at sufficient power settings to define
the gaseous and smoke emissions of the engine so that mass
emission rates and Smoke Numbers corrected to the reference
ambient conditions can be determined at the following specific
percentages of rated output as agreed by the certificating
authority:
Operating mode Thrust setting
Take-off
Climb
Approach
Taxilground idle
100 per cent F,
85 per cent F,
30 per cent F,
7 pex cent F,
2.1.4.3 Reference emissions landing and
take-off (LTO) cycle
The reference emissions LTO cycle for the calculation and
reporting of gaseous emissions shall be represented by the
following time in each operating mode.
The following emissions shall be controlled for certification of
aircraft engines:
Phase
Smoke
Gaseous emissions
Unburned hydrocarbons (HC);
Carbon monoxide (CO); and
Oxides of nitrogen (NO,).
Take-off
Climb
Approach
Taxilgraund idle
Time in operating
mode, minutes
241 1/05
No. 5
ANNEX 16 - VOLUME I1
Part 111 - Chapter 2 Annex I6 - Environmental Protection
2.1.4.4 Fuel specifications
The fuel used during tests shall meet the specifications of
Appendix 4. Additives used for the purpose of smoke suppression
(such as organo-metallic compounds) shall not be
present.
2.1 .S Test conditions
2.1.5.1 The tests shall be made with the engine on its test
bed.
2.1.5.2 The engine shall be representative of the
certificated configuration (see Appendix 6); off-take bleeds
and accessory loads other than those necessary for the engine's
　
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