Definition
A flight conducted to verify that an aircraft, system, or component performs correctly after maintenance, modification, or repair, or to confirm that a pilot meets a required standard of proficiency.
Plain English
A flight made on purpose to test something — either to make sure the aircraft is working properly after work has been done on it, or to confirm that a pilot can fly to the required standard.
Context Anchor
You may see this term after maintenance, when an aircraft has been repaired or adjusted, or during pilot evaluation and checkout discussions.
Derivation
From 'check,' meaning to verify or confirm, combined with 'flight.' The word 'check' here carries the sense of inspecting against a standard, not stopping or restraining.
Why Pilots Care
Confirms the aircraft is airworthy and safe to return to normal operations, preventing in-flight issues from undetected problems.
Intuition Check
Do not read check flight as simply “checking something during a flight.” The main purpose of the flight is the check itself.
Example Sentence 1
After the engine overhaul, the mechanic and pilot completed a check flight before returning the aircraft to the line.
Example Sentence 2
The owner requested a check flight following the annual inspection before accepting the aircraft back into service.