Definition
A written list of items the pilot completes after taxiing to the runup area and before entering the runway for takeoff. It confirms that the engine, flight controls, instruments, fuel system, trim, flaps, and other systems are properly set and functioning, and that the airplane is configured and ready for the takeoff roll.
Plain English
It is the final set of checks the pilot runs through after taxiing out and before lining up to take off, making sure the airplane and its systems are ready to fly safely.
Context Anchor
Used on the ground near the runway, after taxiing and before starting the takeoff roll.
Derivation
“Checklist” comes from “check,” meaning to verify or confirm, plus “list.” That matters here because this is not just a memory aid; it is a written sequence used to confirm that important items have actually been checked.
Why Pilots Care
Following the checklist prevents configuration errors that can cause loss of control, engine problems, or runway incidents immediately after liftoff.
Intuition Check
Do not treat a before-takeoff checklist as something to use only when you are unsure. In aviation, it is a deliberate check used before every takeoff so the pilot does not rely on memory alone.
Example Sentence 1
After taxiing to the runup area, the pilot stopped into the wind and worked through the before-takeoff checklist.
Example Sentence 2
After completing the before-takeoff checklist, the student set the transponder to ALT and verified the fuel selector was on the fullest tank.