Plain English Meaning

All the extra things a pilot needs to learn when moving from flying a single-engine airplane to flying one with two or more engines. It covers what changes, what gets harder, and what new skills are required.

Full Definition

The set of skills, knowledge areas, and handling techniques unique to flying airplanes with more than one engine, which a pilot must learn and demonstrate in addition to the fundamentals of single-engine flight. These considerations include engine-out aerodynamics, asymmetric thrust control, performance planning with one engine inoperative, systems complexity, and the specific procedures used during takeoff, climb, , and in a .