Definition
Flight activities conducted by a student pilot acting as the sole occupant of an aircraft, performed under the authorization and supervisory responsibility of an endorsing flight instructor in accordance with applicable regulations.
Plain English
Flying that a student does alone in the aircraft, with no instructor on board, after their instructor has signed them off as ready.
Context Anchor
Seen in flight training when an instructor decides whether a student is ready and legally allowed to fly without the instructor in the aircraft.
Derivation
Solo comes from the Italian word for 'alone,' from the Latin solus. In aviation, it carries the literal meaning: the student is alone in the aircraft.
Why Pilots Care
Confirms the student can manage the aircraft independently, a required milestone before advancing to cross-country or more complex training.
Intuition Check
Do not read “solo” as simply “practicing by yourself.” In aviation training, solo flight operations mean actual flight without the instructor in the aircraft, and only when properly authorized.
Example Sentence 1
Before authorizing solo flight operations, the instructor reviewed the student's recent landings and confirmed the required endorsements were current.
Example Sentence 2
The student performed three takeoffs and landings during solo flight operations before returning to the ramp.