Canadian Aviation Regulations (SOR/96-433)

705.58 (1) No person shall conduct a take-off in an aeroplane if the weight of the aeroplane is greater than the weight that will allow the aeroplane to attain, with any engine inoperative, a net flight path that

• (a) has a positive slope at 1,000 feet above all terrain and obstructions within five nautical miles on either side of the intended track, at all points along the route or planned diversion therefrom; or

• (b) will permit flight from the cruising altitude to an aerodrome where the requirements of section 705.60 can be complied with, and clears vertically, by at least 2,000 feet, all terrain and obstructions within five nautical miles on either side of the intended track.

(2) For the purposes of subsection (1), the following factors shall be taken into account after an engine failure:

• (a) the effects of wind and temperature on the net flight path; and

• (b) the effects of fuel jettisoning, where the jettisoning is conducted in accordance with procedures set out in the company operations manual and sufficient fuel remains to complete a landing with the required fuel reserves.

705.59 (1) No person shall operate an aeroplane having three or more engines unless

• (a) all points along the intended track are located at a distance that can be flown in 90 minutes or less, with all engines operating at cruise power, from an aerodrome where the requirements of section 705.60 can be complied with; or

• (b) the weight of the aeroplane is not greater than the weight that, according to the two-engines-inoperative enroute net flight path data shown in the aircraft flight manual, will allow the aeroplane to clear vertically, by at least 2,000 feet, all terrain and obstructions within five nautical miles on either side of the intended track, and thereafter to continue flight to an aerodrome where the requirements of section 705.60 can be complied with.

(2) For the purposes of paragraph (1)(b), the following factors shall be taken into account after the failure of two engines:

• (a) the effects of wind and temperature on the net flight path; and

• (b) the effects of fuel jettisoning, where the jettisoning is conducted in accordance with procedures set out in the company operations manual and sufficient fuel remains to arrive at the destination aerodrome at 1,500 feet AGL with a fuel reserve sufficient to fly for 15 minutes thereafter at cruise power.

705.60 (1) Subject to subsection (3), no person shall dispatch or conduct a take-off in an aeroplane unless

• (a) the weight of the aeroplane on landing at the destination aerodrome will allow a full-stop landing

  • (i) in the case of a turbo-jet-powered aeroplane, within 60 per cent of the landing distance available (LDA), or

  • (ii) in the case of a propeller-driven aeroplane, within 70 per cent of the landing distance available (LDA); and

• (b) the weight of the aeroplane on landing at the alternate aerodrome will allow a full-stop landing

  • (i) in the case of a turbo-jet-powered aeroplane, within 60 per cent of the landing distance available (LDA), and

  • (ii) in the case of a propeller-driven aeroplane, within 70 per cent of the landing distance available (LDA).

(2) In determining whether an aeroplane can be dispatched or a take-off can be conducted in accordance with subsection (1), the following shall be taken into account:

• (a) the pressure-altitude at the destination aerodrome and at the alternate aerodrome;

• (b) not more than 50 per cent of the reported headwind component or not less than 150 per cent of the reported tailwind component; and

• (c) that the aeroplane must be landed on a suitable runway, considering the wind speed and direction, the ground handling characteristics of the aeroplane, and other conditions such as landing aids and terrain.

(3) Where conditions at the destination aerodrome at the time of take-off do not permit compliance with paragraph (2)(c), an aeroplane may be dispatched and a take-off conducted if the alternate aerodrome designated in the operational flight plan permits, at the time of take-off, compliance with paragraph (1)(b) and subsection (2).