Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 6417

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, certificating authorities should take into account the probable numbers of such engines that will be produced and their impact on the environment. When such an exemption is granted, the certificating 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 The following emissions shall be controlled for certification of aircraft engines: Smoke Gaseous emissions Unburned hydrocarbons (HC); Carbon monoxide (CO); and Oxides of nitrogen (NOx). 2.1.3 Units of measurement 2.1.3.1 The smoke emission shall be measured and reported in terms of Smoke Number (SN). 2.1.3.2 The mass (Dp) of the gaseous pollutant HC, CO, or NOx emitted during the reference emissions landing and take-off (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 water/kg dry air. 2.1.4.2 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 100 per cent Foo Climb 85 per cent Foo Approach 30 per cent Foo Taxi/ground idle 7 per cent Foo 2.1.4.3 Reference emissions landing and 2.1.4.3 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. Time in operating Phase mode, minutes Take-off 0.7 Climb 2.2 Approach 4.0 Taxi/ground idle 26.0 2007/70/II. szám Part III — Chapter 2 Annex 16 — Environmental Protection 24/11/05 No. 5 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. 2.1.5 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 basic operation shall not be simulated. 2.1.6 When test conditions differ from the reference conditions in 2.1.4 the test results shall be corrected to the reference conditions by the methods given in Appendix 3. 2.2 Smoke 2.2.1 Applicability The provisions of 2.2.2 shall apply to engines whose date of manufacture is on or after 1 January 1983. 2.2.2 Regulatory Smoke Number The Smoke Number at any thrust setting when measured and computed in accordance with the procedures of Appendix 2 and converted to a characteristic level by the procedures of Appendix 6 shall not exceed the level determined from the following formula: Regulatory Smoke Number = 83.6 (Foo)–0.274 or a value of 50, whichever is lower 2.3 Gaseous emissions 2.3.1 Applicability The provisions of 2.3.2 shall apply to engines whose rated output is greater than 26.7 kN and whose date of manufacture is on or after 1 January 1986 and as further specified for oxides of nitrogen. 2.3.2 Regulatory levels Gaseous emission levels when measured and computed in accordance with the procedures of Appendix 3 and converted to characteristic levels by the procedures of Appendix 6 shall not exceed the regulatory levels determined from the following formulas: Hydrocarbons (HC): Dp /Foo = 19.6 Carbon monoxide (CO): Dp /Foo = 118 Oxides of nitrogen (NOx):

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