What distinguishes a power back from a push back?

The distinction between a power back and a push back is primarily centered around the method of movement used to maneuver an aircraft backward from its parked position. A power back specifically involves the use of engine thrust to propel the aircraft backward. This means that the pilots of the aircraft intentionally engage the thrust of the engines in a controlled manner, allowing the aircraft to move on its own power without relying on external equipment.

In contrast, a push back refers to the process of moving an aircraft backward using a tug or tow vehicle. This method is distinct because it does not involve the propulsion of the aircraft's own engines, but rather relies on ground personnel and machinery to facilitate the movement. Understanding this key difference is essential for aircrew and ground operations personnel at airports, as it impacts operational safety and efficiency during taxiing maneuvers.