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5. The acroplane will, in the meteorological conditions expected for the fight, in the event of any two power units becoming inoperative at any poin along the route or on any planned diversion therefrom more than 90 minus flying time in still air at the all power units operating economical cruising speed from the nearest aerodrome at which it can comply with condition 7. relating to an alternate aerodrome, be capable of continuing the fight will all other power units operating within the specified maximum continue power conditions, clearing by a vertical interval of at least 2,000 fe obstacles within 3 nautical milce either side of the intended track, to such an aerodrome, and on arrival over such aerodrome the gradient of the specified net flight path with two power units inoperative shall not be les than zero at 1,500 feet above the aerodrome; and in asscasing the ability of the scroplane to satisfy this condition it shall not be assumed to be capable of flying at an altitude exceeding the specified maximum permissible aliunde for power unit restarting.
6. 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 altermale aerodrome,
7. (1) The landing distances required, respectively specified as being appeo- priate to aerodromes of destination and alternate aerodromes, do not exceed at the aerodrome at which it is intended to land or at any alternate acro drome, as the case may be, the landing distance availablo"on—
(a) the most suitable runway for a landing in still air conditions; and (b) the runway that may be required for landing because of the formas
wind conditions:
Provided that if an alternate aerodrome is designated in the flight plan, the specified landing distance required may be that appropriate to an alter nate aerodrome when assessing the ability of the aeroplane to satisfy this condition at the aerodrome of destination in respect of the runway that may be required for landing because of the forecast wind conditions.
(2) For the purposes of paragraph (1) the landing distance required shall be that specified as being appropriate to-
(a) the landing weight;
(2) the altitude at the serodrome:
(c) the temperature in the specified international standard atmosphere appro
priate to the altitude at the aerodrome;
(4) (0) a level surface in the case of runways usable in both directions (i) the average slope of the runway in the case of runways usable in only one direction; and
( 0) súll air conditions in the case of the most suitable runway for a
landing in still air conditions;
(ii) not more than 50 per cent of the forecast wind component opposit to the direction of landing or not less than 150 per cent of the forecast wind component in the direction of landing in the case of the runway that may be required for landing because of the forecast wind conditions.
THIRD SCHEDULE.
CONDITIONS APPLICABLE TO MEROPLANES CLASSIFIED AS AEROPLANES OF PERFORMANCE GROU? C or D IN THEIR CERTIFICATE OF AIRWORTHINESS.
[reg. *]
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 il to be made.
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1. The take-off run required and the take-off distance required, specified as
being appropriate to~
(o) the weight of the aeroplane at the commencement of the take-off rung (b) the altitude at the aerodrome:
(c) the air temperature at the aerodrome:
(d) the average slope of the surface of the aerodrome in the direction of
take-off over the emergency distance available;
(e) 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,
do not exceed the take-off run available and the emergency distance available, respectively, at the aerodrome at which the take-off la tó be made.
1. The net take-off flight path with all power voits operating, specified as being
appropriate 10-
(a) the weight of the aeroplane at the commencement of the take-off run; (6) the altitude at the aerodrome;
(c) the air temperature at the aerodrome;
(d) 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,
and plotted from a point 50 feet above the end of the take-off distance required at the aerodrome at which the take-off is to be made to the point at which tha aeroplane reaches the minimum altitude for safe flight on the int stage of the route to be lown stated in or calculated from the informa- tion contained in the operations manual relating to the aeroplane, shows that the aeroplane will "clear by a safe margin any obstacle the distance from which to the nearest point on the ground below the intended line of flight of the aeroplane does not exceed 200 feet plus half the wing span of the aeroplane. In assessing the ability of the deroplane to satisfy this condition it shall not be assumed to make a change direction of a radius less than the specified radius of steady tura.
4. The aeroplane will, if it is designated in its certificate of airworthiness as an acroplane of performance group C and if it is necessary for it to be flown solely by reference to instruments for any period before reaching the minimum altitude for safe flight on the first stage of the route to be flown. stated in or calculated from the information contained in, the operations manual, during such period also satisfy condition 3 in the Second Schedule.
5. The seroplane will, in the meteorological conditions expected for the flight, in the event of any one power unit becoming inoperative at any point of its route or on any planned diversion therefrom, and with the other power units or power unit, if any, operating within the specified maximuni con- tinuous power conditions-
(c) in the case of an aeroplane designated as an aeroplane of performance group C, be capable of continuing the fight at altitudes not less than the relevant mizimun altitudes for safe flight stated in, or calculated From the information contained in, the operations manual to a point 1,500 feet above an aerodrome at which a safe landing can be made and after arrival at that point be capable of maintaining that height; (b) in the case of an acroplane designated as an aeroplane of performance group D, be capable of continuing the fight to a point 1,000 feet above a place at which a safe landing can be made :
Provided that in assessing the ability of the scroplane to satisfy this Condition it shall not be assumed to be capable of flying at any point on its route at an altitude exceeding the performance ceiling with all power units operating specified as being appropriate to its estimated weight at that point.