AMP - Aviation Maintenance Technician Powerplant Practice Exam

What does "engine out" refer to in an aircraft?

1. A situation with two engines operating efficiently

2. The failure of one engine in a multi-engine aircraft

3. A situation requiring a complete engine shutdown

4. The successful maintenance of both engines

The correct answer is: The failure of one engine in a multi-engine aircraft

The term "engine out" specifically refers to the scenario where one engine of a multi-engine aircraft has failed or is inoperative. This situation is critical in aviation as it significantly impacts the aircraft’s performance, control, and safety. When one engine fails, the pilot must rely on the remaining engine(s) to maintain flight and navigate safely back to a landing. This condition necessitates immediate assessment and response from the flight crew, including potential emergency procedures to manage the aircraft’s handling characteristics and performance. The other options do not reflect the correct use of the term. Option A describes a situation with two engines operating efficiently, which is the opposite of an "engine out" condition. Option C mentions a complete engine shutdown, which may not involve failure and could be a planned maintenance procedure rather than an accidental failure. Option D focuses on the successful operation of both engines, also contrary to the "engine out" scenario. Thus, option B accurately encapsulates the essence of what "engine out" means in aviation.