# The Air Navigation (General) Regulations 1993, Regulation 11: Weight and performance of public transport aeroplanes classified as aeroplanes of performance group F in their certificates of airworthiness


For the purposes of article 30(1), an aeroplane registered in the United Kingdom in respect of which there is in force under the Order a certificate of airworthiness in which the aeroplane is designated as being of performance group F shall not fly for the purpose of public transport unless the weight of the aeroplane at the commencement of the take off run is such that the following conditions are satisfied—
(1) That weight does not exceed the maximum take off weight specified for the altitude and the air temperature at the aerodrome at which the take off is to be made.
(2) The take off distance required specified as being appropriate to—
(a) the weight of the aeroplane at the commencement of the take off run;
(b) the altitude at the aerodrome;
(c) the air temperature at the aerodrome; and
(d) the average slope of the surface of the aerodrome in the direction of take off over the take off run available; and not more than 50 per cent. of the reported wind component opposite to the direction of take off or not less than 150 per cent. of the reported wind component in the direction of take off,
does not exceed the take off run available at the aerodrome at which the take off is to be made.
(3) The aeroplane, at any time after it reaches a height of 1,000 feet above the aerodrome from which take off is to be made, will, in the meteorological conditions expected for the flight, in the event of any one power unit becoming inoperative at any point on its route or on any planned diversion therefrom, and with the other power unit or power units, if any, operating within the specified maximum continuous power conditions, be capable of continuing the flight at altitudes not less than the relevant minimum altitude for safe flight stated in, or calculated from the information contained in the operations manual relating to the aeroplane to a point 1,000 feet above—
(a) in the case of an aeroplane having one power unit, a place at which a safe landing can be made; and
(b) in the case of an aeroplane having two or more power units, an aerodrome at which it can comply with condition (5).
Provided that, in assessing the ability to satisfy this condition—
(i) the aeroplane shall not be assumed to be capable of flying, at any point on its route or on any planned diversion therefrom, at an altitude exceeding that at which it is capable of a gradient of climb, with all power units operating within maximum continuous power conditions specified, of 2 per cent., and
(ii) over those parts of the route or any planned diversion therefrom, where in the meteorological conditions expected for the flight it is expected that the aeroplane will be out of sight of the surface due to cloud cover at or below the relevant minimum safe altitude, the aeroplane shall be required to be capable of a gradient of climb, with one power unit inoperative and with the other power unit or power units operating within the specified maximum continuous power conditions, at the relevant minimum safe altitude, of 1 per cent.
(4) The landing weight of the aeroplane will not exceed the maximum landing weight specified for the altitude and the expected air temperature for the estimated time of landing at the aerodrome at which it is intended to land and at any alternate aerodrome.
(5) (a) The landing distance required does not exceed at the aerodrome at which it is intended to land or at any alternate aerodrome, as the case may be, the landing distance available on the most suitable runway for a landing in still air conditions;
(b) For the purposes of sub-paragraph (a) the landing distance required shall be that specified as being appropriate to—
(i) the landing weight;
(ii) the altitude at the aerodrome;
(iii) the temperature in the specified international standard atmosphere appropriate to the altitude at the aerodrome;
(iv) a runway with a level surface; and
(v) still air conditions.
(6) A single-engined aeroplane designated as aforesaid as an aeroplane of performance group F shall not fly for the purpose of public transport at night or when the cloud ceiling or visibility prevailing at the aerodrome of departure or forecast for the estimated time of landing at the aerodrome at which it is intended to land and at any alternate aerodrome are less than 1,000 feet and one nautical mile respectively.

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Source: https://www.legislation.gov.uk/uksi/1993/1622/regulation/11 (the official version)
Page: https://openlegislation.uk/air-navigation-general-regulations-1993/regulation-11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.