(ii) An seroplane having four power units shall, if any two power units become inoperative at any point along the route or any planned diversion therefrom, being a point more than 90 minutes flying time (assuming all power units to be operating) from the nearest aerodrome at which a landing can be made in compliance with condition (3) (2) of this regulation relating to an alternate aerodrome, be capable of continuing the Night at an altitude of not less than 1,000 feet above ground level to a point above that aerodrome. In assessing the ability of the aeroplane to satisfy this condition, it shall be assumed that the re- maining power units will operate within the maximura continuous power conditions specified in the said flight manual, and account shall be taken of the temperature and wind conditions expected for the flight.
(3) (1) The weight of the aeroplane at the intended time of landing (hereinafter in this regulation called "the landing weight") calculated by deducting the estimated weight of fuel and oil expected to be used on the flight from its weight at the commencement of the take-off run will not exceed any of the maximum landing weights specified in the said flight manual as being appropriate to the heights above mean sea level of the aerodrome of intended landing and any alternate aerodrome.
(ii) The landing runway lengths respectively specified in the said flight manual as being appropriate to aerodromes of intended destination and to alternate acrodrome, and to-
(a) the landing weight;
(5) the height above mean sea level of the aerodrome: (c) still air conditions; and
(d) not more than 50 per cent of the forecast wied component opposite to the direction of landing ar not less than 150 per cent of the forecast wind com- ponent in the direction of landing.
do not exceed the landing distance available at the aerodrome at which it is intended to land or at any alternate aerodrome, as the case may be, on the most suitable runway for a landing in still air and on the runway that may be required for landing because of the expected wind conditions.
37B. With reference to Article 17(6) of the Order, a public transport acroplane classified in the certificate of airworthiness relating to the aeroplane issued or rendered valid by the Director as an aeroplane of performance group X shall not fly or attempt
9
lo ly over water so as to be more than 60 minutes flying time from the nearest shore unless it has more than two power units. For the purposes of this regulation, flying time shall be calculated st normal cruising speed with one power unit inoperative.".
6. Regulation 38 of the principal regulations is amended- (a) by the addition after the figures "38" of the following- "(1)":
(b) by the deletion of the word and figures "or 37" and the sub-
stitution therefor of the following-
", 37, 37A or 378"; and
(c) by the addition at the end thereof of the following-
7.
*4(2) In assessing the ability of an aeroplane to comply with regulations 36(4) and (5) and 37A(2)()(6) and 37A(2)(ii) account may be taken of any reduction of the weight of the aeroplane which may be achieved after the failure of a power unit by such jettisoning of fuc) as is feasible and prudent in the circumstances of the flight and in accordance with the said flight manual.". Regulation 39 of the principal regulations is amended-
Amendment
of regula- tion 39.
Amendment of regula.
(a) by the deletion of the word and figures "and 37" and the tion 39.
substitution therefor of the following—
37, 37A and 37B":
(6) by the deletion in paragraph (b) of the word "twice" and the
substitution therefor of the following-
"one and one half times": and
(c) by the deletion of paragraph (4) and the substitution therefor
of the following-
"(d) the fanding distance available means the distance from the point on the surface of the aerodrome above which the aeroplane can commence its landing. having regard to the obstructions in its approach path, to the nearest point in the direction of landing at which the surface of the aerodrome is incapable of bearing the weight of the aeroplane under normal operating conditions or at which there is an obstacle capable of affecting the safety of the aeroplane.". # Regulation 45 of the principal regulations is revoked and Revocation replaced by the following-
"45. With reference to Article 18(4) of the Order-
(1) The operator of a public transport aircraft registered in Hong Kong shall not permit any person to fly as the pilot in charge of that aircraft during any flight unless that person has had training,
and replace-
rrent of regulation
45.