Emergency Turn refers to the path over the ground that is followed by an aircraft that has experienced an engine failure during takeoff. An Emergency Turn is interchangeably referred to as an Escape Routing or as an Engine Out SID.
Regulatory Requirement
Takeoff and initial climb performance requirements following an engine failure are specified in National Regulations. These regulations require that the aircraft be capable of meeting a specified minimum climb gradient, the value of which is dependent upon the number of engines installed and the regulatory criteria under which the aircraft has been certified, until reaching 1500' AGL or the minimum enroute altitude.
Takeoff Performance
Takeoff performance can be limited by any of the following: