Air Navigation (Noise Certification and Limitation) Order 1972.
Statutory Instruments
Source: Statutory Instruments

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paragraphs: (1) This Order may be cited as the Air Navigation (Noise Certification and Limitation) Order, 1972.
(2) This Order shall come into operation on the 12th day of December, 1972.
2 Definitions.
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paragraphs: In this Order—
"authorised person" means a person authorised under section 64 of the Air Navigation and Transport Act, 1936 ;
"by-pass ratio" means the ratio of the air mass flow passing through the by-pass ducts of a gas turbine engine to the air mass flow passing through the combustion chambers of that engine, calculated at maximum thrust when the engine is stationary in an International Standard Atmosphere at sea level;
"Chicago Convention" has the meaning assigned to it by section 2 of the Air Navigation and Transport Act, 1946 (No. 23 of 1946), and includes any annex to the Chicago Convention relating to international standards and recommended practices and adopted in accordance with the Chicago Convention, and any amendment of any such annex made in accordance with the Chicago Convention;
"EPNdB" means a unit for expressing effective perceived noise level determined in accordance with the method described in Appendix I of Annex 16 to the Chicago Convention;
" International Standard Atmosphere at sea level" means an atmosphere of which the characteristics are as follows:
(a) the air is a perfect dry gas;
(b) the physical constants are:—
(i) sea level mean molecular weight:
M0 = 28·9644 X 10-3Kg mol-1,
(ii) sea level atmospheric pressure :
P0 = 1013·250 millibars,
(iii) sea level temperature: to = 15°C.
T0 = 288·15°K,
(iv) sea level atmospheric density:
P0 = 1·2250 Kg m-3,
(v) temperature of the ice point: Ti = 273·15°K,
(vi) universal gas constant: R* = 8·31432 joules
(°K)-1mol- ;
"maximum total weight authorised" means the maximum total weight of the aircraft and its contents at which the aircraft may take off anywhere in the world in the most favourable circumstances in accordance with the certificate of airworthiness in force in respect of the aircraft ;
"the Minister" means the Minister for Transport and Power;
"subsonic aeroplane" means an aeroplane incapable of sustaining level flight at speeds exceeding the speed of propagation of sound pressure waves in air.
3 Purpose of Order.
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paragraphs: This Order is for the purposes of—
(i) giving effect to Annex 16 of the Chicago Convention in respect of noise certification of aeroplanes, and
(ii) making such directions as may be necessary from time to time in respect of procedures for the limitation of noise made by aircraft in certain locations and in certain circumstances.
4 Application of Order.
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paragraphs: This Order applies to every subsonic aeroplane having turbine jet or turbine fan engines which—
(a) has a maximum total weight authorised of more than 5,700 Kg.,
(b) requires for take-off a runway length in excess of 450 metres, and
(c) (i) is powered by engines having a by-pass ratio of 2 or more and for which a certificate of airworthiness was first issued on or after the 1st day of March, 1972, or
(ii) is powered by other classes of engines, unless it is an aeroplane in respect of which the application for a certificate of airworthiness for the prototype of the aeroplane was accepted before the 1st day of January, 1969, or another equivalent procedure was effected by the certificating authorities of the state in which the aeroplane was manufactured before that date.
5 Requirement of a Noise Certificate.
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paragraphs: Within the State, no person shall land or take-off, or cause to be landed or to be taken off, an aeroplane to which this Order applies unless—