Canadian Aviation Regulations

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.