What is the primary distinction between air time and flight time?

The primary distinction between air time and flight time lies in how each is defined in relation to the aircraft's operation. Flight time is specifically measured from the moment the aircraft begins to move under its own power until it comes to a stop after landing. This definition encompasses all phases of the flight that involve powered movement, which includes takeoff, cruising, and landing.

Air time, on the other hand, refers to the duration the aircraft is in the air, which does not start until the aircraft becomes airborne and continues until it touches down. Therefore, while flight time can be considered a broader measurement that could include taxiing if the aircraft is moving under its own power, air time strictly refers to the period the aircraft is actively flying in the air.

Understanding these definitions is crucial for logbook entries and regulatory compliance, especially in the context of pilot training and for adhering to legal requirements regarding flight experience.